Interference Engine Timing Belt Broke

This belt is a wear item and must be replaced in a timely manner to ensure proper engine operation. If your vehicle has an interference engine, and the timing belt or serpentine belt comes off, it will likely damage. I took it to mechanic he says its an interference engine and it has damaged the cylinder. No biggie I tell him. I'd like to just replace the belt and hope for the best. I pulled off to the side of the road -- the cold, dark, middle-of-nowhere, Indiana road -- and just to make sure to do the worst thing I possibly could do, I then cranked the engine. If the timing belt broke, the pistons bent the intake valves and disrupted the timing of the camshaft and crankshaft. 0 engine is an interference engine, meaning if the belt breaks there is a good chance that the valves are shot and the pistons have most likely been damaged as well. 9L and it was non interference. This is where they are when you have the crank set to the belt install timing mark. The valves simply stopped wherever they were when the belt broke, making internal combustion impossible. I just want to let you guys know at 97500 the timing belt failed in the engine and since it is an interference engine it was a total loss. 4 DOHC seems to have broken (although I haven't taken it apart yet). I was told that my Mercury Villager has an interference engine. I've been told that depending on what car you drive, a failed timing belt can result in immediate engine damage. The engine is an interference engine so I was aware that the valves might be bent resulting in major engine repair. At the moment you have an engine which had a broken timing belt. Since it's an interference engine and it had high miles, they said to scrap the car. They said normally Subarus do not experience any internal engine damage when a timing belt breaks. but the fact of the matter is, any 2. Nothing moved inside on the engine, so they assumed it was a broken timing belt. Keep in mind that not all cars use a rubber timing belt as modern vehicles use a timing chain which should outlast the engine itself. I had the tensioner let go on me, I guess the spring inside it slipped around about an inch and released the belt, the engine stalled and wouldnt start, but there was no damage to the head. The dealership offered to do the timing belt service for $1000, but could not guarantee that their was no damage. timing belt broke on a freeway going 50mph it didnt make any noise from the engine when it happened. Short answer is no. A non-interference engine provides clearance between the valves and pistons, so if the timing belt breaks, you might end up with bent valves, and you might have to have your cylinder heads rebuilt. The bolt to my belt tensioner broke causing the timing belt to jump. In interference engine designs, regular belt or chain service is essential, as incorrect timing may result in the pistons and valves colliding and causing extensive internal engine damage. ) rotate cam until valves on cyl 1 are both closed. Just because an engine is said to be a non-interference engine does not mean it is 100% of the time. 8 turbo then no damage as it is considered a non interference engine under no circumstance will the valves hit the cylinder head. Also, avoid hanging new timing belts on a hook or rack, or just stuffing them into a sack. Broken timing belt at idle VW MKIV-A4 TDIs (VE and PD) Look them over VERY carefully if you intend to not pull the head. 1 - Belt manufacturers suggest the belt be replaced at 60,000 mile intervals. If it breaks and your engine is an interference engine, you. I recently heard about the catastrophe when a Sumo engine's timing belt snapped. I know if the belt is changed every 100K or so it isn't a problem. It has an interference engine. This tells you that the timing belt is broken. By Alldata repair manual say that it is an interference engine. Interference engines, also known as "destructive head" engines are the ones that have little clearance between the valves and pistons and if the cam stops turning as a result of broken timing belt or chain, the valve(s) will bend or break. Some are interference engines and if the belt slips or breaks, engine damage normally occurs. Does 2006 PT Cruiser have non-interference engine? (Timing Belt Broke) 3 Answers. I've snapped a timing belt on a couple N/A 2. Timing chain failure can also result in engine failure, requiring engine replacement. Does not matter if a 4 Cly or v-6 engine. But if it is an interference engine, the valves may be bent and I've got to remove the head. Timing belt interference engine chart and interference engine timing belt broke with teeth timing pulley belt 25 and then timing belt interference motor moreover timing belt failure likewise broken timing belt and camshaft timing belt further car timing belt likewise cars without timing belts further 2000 mitsubishi mirage 1 8 timing belt also hyundai genesis timing belt plus timing belt. everyone who has had a broken timing. It's not an easy job, but not the hardest you could do either. If your vehicle has an interference engine, and the timing belt or serpentine belt comes off, it will likely damage. Its blowing. 2009 Honda Pilot New Timing Belt broke submitted 4 years ago by howardknob About a month ago I had the B14 code to have a timing belt and water pump replaced (vehicle has about 100k miles). Also Chevy says the timing belt, water pump and other components have to be replaced at 97,000 miles or every 10 years. (Interference engine) in this vehicle, knowing that if the timing belt went it would. In the notes on the work order they wrote that cyl 1. So I got a timing belt kit which included a couple idler pulleys, timing belt tensioner, timing belt, etc. Timing belts are more likely to fail than timing chains, but both should be inspected on a regular basis and for those engines employing a timing belt, regular replacement is essential. Although the pistons will not hit the valves, the valves from both camshafts can hit each other. But valves might not necessarily be bent. The piston will likely bend the valves, or, if a piece of valve or piston is broken off within the cylinder , the broken piece may cause severe damage within. A timing belt is a belt that usually features teeth on the inside surface, while a timing chain is a roller chain. We will have it fixed in a few hours. ) remove cam cover. 80% chance needs new engine as it happened on highway. 0L engines in the Escorts are NON INTERFERENCE ENGINES meaning the pistons WILL NOT hit the valves if the timing belt breaks. If your engine sounds differently while cranking over it could mean the timing belt has broken and the engine cannot generate any compression. The timing belt on my Caravan 2. 4 liter, 4 cyl Outlander engine? I just broke a belt on my Outlander (it's a so-called interference-type engine) and am wondering what level of drive train and/or lower end damage to expect. With the cover partially off, I can see that the belt is broken. If you suspect that your engine has jumped timing, don't just let it go and hope for the best. I pulled off to the side of the road -- the cold, dark, middle-of-nowhere, Indiana road -- and just to make sure to do the worst thing I possibly could do, I then cranked the engine. An Interference engine is a type of internal combustion engine where in the event of a serious valve train failure, or a 180 degree timing error, could lead the valves and pistons to strike each other. My sister's 90 240 broke a belt at. As you can imagine with the compression of ~19. He did the compression test in front of me and 2 of the cylinders leak 30% of the air. The next step was to turn the engine to TDC, compression stroke for #1 cylinder. The engine is an interference engine so I was aware that the valves might be bent resulting in major engine repair. Although they are both internal combustion engines, the "interference" word refers to the timing configuration of the engine. Who cares if an engine is interference. But when they got it all back together, with a new timing belt, the new one broke after about 15 minutes of firing it up. 4 DOHC seems to have broken (although I haven't taken it apart yet). Exterior; Body side molding; Chrome/bright trim on side of body; Chrome front and rear bumpers; Complex surface lens halogen bulb headlights; Day time running lights; Delayed/fade. Millions of engines use timing belts. everyone who has had a broken timing. Reader Question Last week my timing belt broke on my 2000 Nissan Frontier V6 2-Wheel drive truck. In this two-part tutorial, you'll see the process for replacing the timing belt on a 1991 Mitsubishi 3000GT with a 3. An interference engine is one that has insufficient clearance between the valves and pistons if the cam stops turning due to a broken timing belt. If a timing belt breaks in an interference engine, open valves may come into contact with one another. he said im gambling by putting a new belt. If the belt were to break valve damage can still occur even in a non-interference engine. Page 1 of 2: How to Test For A Broken Timing Belt (2001-2005 1. ** - Does not include camshaft tensioner hydraulic assembly. A timing belt, timing chain, or cambelt is a part of an internal combustion engine that synchronizes the rotation of the crankshaft and the camshaft(s) so that the engine's valves open and close at the proper times during each cylinder's intake and exhaust strokes. Parts ARE expensive (compared to most any other marine engine). 6 Pinto engine, 2. But when they got it all back together, with a new timing belt, the new one broke after about 15 minutes of firing it up. If belt broke, there is likely engine damage. IMPORTANT NOTICE: Images are for representation purpose only. If you have a non-interference engine, a broken belt is not really a big deal. ,but my PT said 50/50 that the engine is ok or not. The piston will likely bend the valves, or, if a piece of valve or piston is broken off within the cylinder , the broken piece may cause severe damage within. The timing belt is usually a belt placed to maintain the engine mechanism. The valves simply stopped wherever they were when the belt broke, making internal combustion impossible. Moreover, I've read that 70% of the cars on the road have interference engines, so this is something I want to make sure I understand. 4 DOHC seems to have broken (although I haven't taken it apart yet). I’d say in 95 percent of cases, when a timing belt breaks on a car with an interference engine (where the valves and pistons can collide if things go wrong), at least one of the valves gets. The pictures were taken AFTER they were cleaned up. Comments: No comment here, but a question looms my mind, a 2003 A4 3. "The SOHC EJ Subaru boxer engines were non-interference engines through 1996, run by a single timing belt driving both cams (both sides of the engine) and the water pump. Exterior; Automatic Headlights With Dusk Sensor; Daytime Running Lights; Delayed Courtesy Light; Halogen Headlights; Heating, Ventilation & Air Conditioning; Manual Air Conditioni. More specifically, there's a good chance that the you've got bent valves on your hands (that'll require removing the cylinder head to replace). The manufacturer recommends replacement of the timing belt at 60,000 miles. That motor also has a balance shaft belt, but if you get a kit you'll get everything you need including seals. Other cars do not have this sort of engine and damage results. If you suspect that your engine has jumped timing, don't just let it go and hope for the best. Mazda 626 4cyl And V6 1993-2002 Non-interference it means that if the timing belt breaks, the engine won't be damaged. com is a MotorWeek Sponsor) Next to some timing belt engine applications in the RockAuto. Leave that snake in the box until you're ready to put it into an engine. , In Stock 100% guarantee. It has the 3. Given: Interference engine. All that he knew was that the belt had snapped. The engine will not run at all. I've had two timing belts break on my '88 Escort and all I did was realign the timing marks and put a new belt on it with no damage either time. On interference engines, a timing belt failure is really bad news because there is not enough clearance for the valves to clear the pistons if the belt snaps. It's done 100k miles and ready for the timing belt replacing. I'd suggest that you have a Mazda Dealership, specifically, address such matters for you. When I bought it, I thought the 2. The only way to check is to throw new belt and whatever else seized (pump or tensioner pulley) and check compression. A broken timing belt just isn't that expensive to repair even if you pay someone to do it. Worse yet, if the engine is an "interference" engine (one that lacks sufficient clearance between the valves and pistons if the cam stops turning), the result can be one or more bent valves (usually intake valves), and possibly a. Mazda 626 4cyl And V6 1993-2002 Non-interference it means that if the timing belt breaks, the engine won't be damaged. Interference and non-interference timing belt or chain. Some cars, like Subaru, have non-interference engines, which means that if the timing belt breaks while you are driving, there is no damage to the internal parts of the engine. Actual product size and configuration available may differ from those shown. " This usually means the pistons will hit the valves. I'd like to just replace the belt and hope for the best. 4L V6 Timing Belt Replacement. The repair cost will depend on the damage. If the vehicle has an interference engine, the repair might be expensive, read more below. A little time-saver trick here -- I removed the fan from the front of the engine, not bothering to loosen the air pump. 2009 Honda Pilot New Timing Belt broke submitted 4 years ago by howardknob About a month ago I had the B14 code to have a timing belt and water pump replaced (vehicle has about 100k miles). ,but my PT said 50/50 that the engine is ok or not. Its engine is 2. Reader Question Last week my timing belt broke on my 2000 Nissan Frontier V6 2-Wheel drive truck. If you suspect that your engine has jumped timing, don't just let it go and hope for the best. Timing belt broke while driving I have a 1997 Mazda Miata. They gave just enough clearance between the valves and the pistons that, assuming there's not a lot of buildup on the valves, you won't hit if the timing belt breaks. Timing belt interference engine chart and interference engine timing belt broke with teeth timing pulley belt 25 and then timing belt interference motor moreover timing belt failure likewise broken timing belt and camshaft timing belt further car timing belt likewise cars without timing belts further 2000 mitsubishi mirage 1 8 timing belt also hyundai genesis timing belt plus timing belt. Maybe I'm not searching in the right place?. here is some info DIRECT FROM LEXUS that will state the FACT that no engine built before 97 is interference. I took it to mechanic he says its an interference engine and it has damaged the cylinder. On Friday the timing belt on my 2005 Civic LX with 162,000 miles failed causing valve damage in my interference engine (apparently the pistons collided with the valves damaging the valves). and yes, im speaking from experience :lol: I had the timing off on a 4. This tells you that the timing belt is broken. Well, the next thing would be timing chain, I guessed. In a nutshell, a broken timing belt leads to. But if the timing belt or chain breaks, the valves and the pistons will travel into each other causing serious engine damage. 0ltr in both single and double-overhead-cam configurations are interference engines. The chevy's timing belt broke and left it sit. It was towed to my mechanic whom did not want to do the work. The fail-safe position is to assume interference design and rigidly adhere to recommended timing belt replacement intervals. An interference type engine means that the valve's stroke and piston's stroke take up the same space in the cylinder, so the timing belt essentially keeps them from smashing into each other, since. I have a 2006 kia rio, the timing belt broke. This is not true with freewheeling non-interference engines. If OK -- you should replace water pump, tensioner pulley, timing belt. But when they got it all back together, with a new timing belt, the new one broke after about 15 minutes of firing it up. If belt broke, there is likely engine damage. 3 mitsubishi eingin out of a samauri , it. The timing belt is located in front of your vehicle’s engine. White smoke is a sign of burning engine coolant. So why design an interference engine at all?. If your timing belt accidentally snaps ahead of its replacement, it can have serious implications for your engine and car. When they called me back, the new person said that no it was not an interference engine, but that the timing belt breaking could cause "other damage". I've snapped a timing belt on a couple N/A 2. 2L without the timing belt just to prove it will not damage anything. A belt failure on an interference engine almost always results in one or more bent valves - or worse. Which led me to the VG33 swap. Short answer is no. Cost was $650 for belt, water pump and labor in 2012. Do not rotate camshaft or crankshaft when timing belt is removed, or engine damage may occur. All hondas from what I know of are interference engines! Even if you were running at idle and the belt broke you would most likely bend valves. he said im gambling by putting a new belt. The engine gets stuck and it can lead to piston damage as well. Toyota Tundra: How to Replace Timing Belt and Water Pump. I've certainly seen interference motors survive slipped/broken timing belts if they were idling at the time. The engine has the same service interval that most belt driven cams have - about 60K miles. Moreover, I've read that 70% of the cars on the road have interference engines, so this is something I want to make sure I understand. It's important for you to know, because if the timing belt breaks, a non-interference engine will simply fail to start, while an interference engine could sustain heavy internal damage. Yes, it does have an interference engine so do replace your timing belt on schedule time or else the engine might be dead when the timing belt is broken. New belt and good to go two hours later. If doing work yourself it can pay to hang the new timing belt and then do compression check to see what's going on. (Interference engine) in this vehicle, knowing that if the timing belt went it would. Now I'm moving that up to 30K intervals. That's a relief to hear! I wiped a rag around earlier & spotted that there was an gap between the timing belt cover and the crankcase. Engines are either interference or non-interference. The piston will likely bend the valves, or, if a piece of valve or piston is broken off within the cylinder , the broken piece may cause severe damage within. If the belt broke on the 2. Which led me to the VG33 swap. The timing belt is driven by the crankshaft, and turns the cam and the intermediate shaft; indirectly, it drives the distributor. hi just because the belt broke it dosent mean there is damage to the engine turn it over by hand ie:the cams and then the crank if all is has should be just reset timing and replace belt I had a sierra and a mondeo belts brake on me engine was fine. The real issue is the timing belt. To check the values, I would need to put on a timing belt to do compression. 3L engine is an interference engine. They are an interference engine, but a timing belt failure does not 100% guarantee a catastrophic engine failure. My sister's 90 240 broke a belt at. 0T FSI is an interference engine (a. At that point they investigated further and found that the cam shaft was all seized up. I would bet that there are a few bent valves. Yes, the '96 16v is an interference engine. I don't think that an engine had to be DOHC to be an interference motor either, but I guess I don't know that for sure. In interference engine designs, regular belt or chain service is essential, as incorrect timing may result in the pistons and valves colliding and causing extensive internal engine damage. He did the compression test in front of me and 2 of the cylinders leak 30% of the air. Timely changing of your timing belt is an often overlooked car care service, and that’s not good! And Pat Goss tells us why down at Goss’ Garage. They are an interference engine, but a timing belt failure does not 100% guarantee a catastrophic engine failure. For specific size and model, please refe. That's a relief to hear! I wiped a rag around earlier & spotted that there was an gap between the timing belt cover and the crankcase. he said im gambling by putting a new belt. Another reason is that over time, a timing belt stretches. Recommend doing the timing belt and water pump together. Any dimpled or spider web cracks (which can be hard to see with the cam in the way) obviously means damage has occurred. More specifically, there's a good chance that the you've got bent valves on your hands (that'll require removing the cylinder head to replace). My Car Has a Broken Timing Belt. There was no damage to the engine, but I did try to crank it several times, not knowing what had caused the initial loss of all engine power. Interference engine+broken belt=bent valves. Basically , an interference engine means that during a full engine cycle the pistons and the valves will share the same space and if the timing is off, contact will be made. I had the tensioner let go on me, I guess the spring inside it slipped around about an inch and released the belt, the engine stalled and wouldnt start, but there was no damage to the head. But when they got it all back together, with a new timing belt, the new one broke after about 15 minutes of firing it up. So, valve cover came off. then I put in first gear and tried to start to give it a push to park it 3 meters from the incident spotWhen I reached home I googled and came to know that it damages engine if tried to start the car. non-interference engines. The tow truck took my car to the nearest garage where they confirmed that the timing belt failed; this surprised me a little as I thought that when a timing belt broke you would hear a loud bang, but not always as it turns out. Given the age, hydraulic tensioner is also recommended. Mechanic said I probably have an interference engine and might need a new engine. This is where they are when you have the crank set to the belt install timing mark. 3L engine is an interference engine. Some are interference engines and if the belt slips or breaks, engine damage normally occurs. After confirming the belt was broken I opted to just replace the belt and see what happend. Otherwise, replace units. If it breaks and your engine is an interference engine, you. he said im gambling by putting a new belt. I was told by my mechanic that the timing belt broke. All that he knew was that the belt had snapped. But like i said there is a possibility that the valves hit each other and bent. Bearing in mind that this is an interference engine (1. Also note the pistons positions, all at 1/2 way. The fail-safe position is to assume interference design and rigidly adhere to recommended timing belt replacement intervals. The belt was loose enough to have the pistons slam 10 of the valves and bend them. Dealer wants $500 to. The piston will likely bend the valves, or, if a piece of valve or piston is broken off within the cylinder , the broken piece may cause severe damage within. timing belt broke on a freeway going 50mph it didnt make any noise from the engine when it happened. Still, it should be done at 60,000 miles. Suspect, since it's Gates, they probably only cover belt-timed engines? I haven't been able to find anything online that gives me a definitive yes, no, or otherwise, and I've gotten three different answers from. The bolt to my belt tensioner broke causing the timing belt to jump. The next step was to turn the engine to TDC, compression stroke for #1 cylinder. The timing belt on my 95 escort(1. An interference engine is one that has insufficient clearance between the valves and pistons if the cam stops turning due to a broken timing belt. Interference Engine Timing Belt Survival was created by Johnr09 Last week while driving down the Interstate at 65 in my 1997 Acura Integra LS and the timing belt stripping out a bunch of teeth stranding me along side the road. I reckon you have some options 1) Turn the crankshaft by hand. Many times when you break a timing belt on an interference motor it will only bend a few of the valves. I'd like to just replace the belt and hope for the best. Before pulling the heads, it might be worth while to pull the top and side covers and take a look at the rockers/followers. The belt was loose enough to have the pistons slam 10 of the valves and bend them. However, if you neglect this major service, you risk being stranded due to a belt break. Does anyone know if this engine is interference or non-interference? It has relieved pistons so I thought it would be non-interference, but I've found conflicting information. It is impossible to drive a car with a broken timing belt because the belt regulates the movement of the crankshaft and the camshaft. The mechanic said that always, some valves get bent and always pistons get. * - Interference engine. )My timing belt just broke this morning. Given: Broken timing belt. dont believe your neighbor mechanic or even me for that matter read it for your self. Interference Engines - Complete List The following list will provide you the information on whether your car engine is an interference engine or a non-interference engine. [other then exotics, interference engines, and the like] What is the mileage on the engine?. Given the age, hydraulic tensioner is also recommended. Replacing the Z31 timing belt is one of the most important items of maintance you need to do on your Z31. Thanks, i was told by a mobile mechanic that i would need a new engine. Steve Saunders Goldwing Forums > Forums > Goldwing Technical Forum > 5 year old "New" Timing Belts For GL1500. Recognizing the sound, I immediately checked my timing belt, and to my surprise, it appeared fine. Left the old tensioner in and installed the nylon grommet that comes with the belt kit. Valves stuck wide open will not be hit by the pistons. Other cars do not have this sort of engine and damage results. 0 litre was a safe engine 1. Most likely you can put a timing belt on it and drive off. A non-interference engine will stall, if a timing belt breaks, but further damage might be limited. Any dimpled or spider web cracks (which can be hard to see with the cam in the way) obviously means damage has occurred. I have a 1996 Mitsubishi Galant now everything was fine until my car shut off in the middle of the road and I was told my timing belt broke so I took it to a shop and he said my car had a interference motor so he has to take the whole head gasket off and see if it bent valves and replace the timing belt and stuff. That may have been due to a bad belt or improper installation or a seized idler tension pulley. Bearing in mind that this is an interference engine (1. 2L without the timing belt just to prove it will not damage anything. I would bet that there are a few bent valves. ,but my PT said 50/50 that the engine is ok or not. And he got very "umm well" when I pressed on details. Otherwise, replace units. First timing belt replaced at 110,000. Interference vs. If the engine is a 1. It just died while driving home from work, and when I tried to start it again there seemed to be no compression. I was told that my Mercury Villager has an interference engine. All that he knew was that the belt had snapped. Now I'm moving that up to 30K intervals. I'd like to just replace the belt and hope for the best. When a timing belt of an interference engine breaks, it causes damage to the valves and piston which might have gravely mutilate the engine. Free-Running or Interference Engine? An engine is either “interference” or “free-running” depending on its design. "The SOHC EJ Subaru boxer engines were non-interference engines through 1996, run by a single timing belt driving both cams (both sides of the engine) and the water pump. The overall impact of a broken timing belt does depend on the type of engine installed in your vehicle. It is either a belt or chain. With the vehicle in neutral turn the crank by until the timing guide 0 (ZERO) is lined up with the notch in the pulley. Other interference engine applications may exist which are not indicated here. When his timing belt broke the valves of the engine stopped opening and closing in sync with the movement of the pistons. But like i said there is a possibility that the valves hit each other and bent. I'm not going to spend a thousand dollars on repairs, but I'd like to at least try fixing this car before dumping it. To check the values, I would need to put on a timing belt to do compression. I had the car booked in to have it changed the following week. If you're covered under the powertrain warranty, a broken belt just means a headache while the dealership replaces most of the valves (Audiworld has a nice dramatic view of what happens when a timing belt breaks in an interference engine). Interference engines, also known as “destructive head” engines are the ones that have little clearance between the valves and pistons and if the cam stops turning as a result of broken timing belt or chain, the valve(s) will bend or break. 600 $ to change the belt. White smoke is a sign of burning engine coolant. Try the new belt, you never know. Millions of engines use timing belts. he said im gambling by putting a new belt. The overall impact of a broken timing belt does depend on the type of engine installed in your vehicle. This is where they are when you have the crank set to the belt install timing mark. Or broken valves and damaged pistons and also the cylinder head. 8 TCDi, got the timing belt broken 2 days ago. Also is the 1. Had it towed and they pulled it apart to confirm it was the belt. (Not much space in the combustion chamber) The timing belt must be replaced every 80K miles with the factory belt that was issued for the 2002 model year. At 105,000 miles, the timing belt broke while we were driving. This is why there is no mention of the timing belt on the maintenance schedule for that engine. 9 l, same engine) broke at 120km/hr without any damage( 127,000 k on the engine). The manufacturer recommends replacement of the timing belt at 60,000 miles. You can ignore the timing belt change on one of those engines if you don't mind getting stuck. Actual product size and configuration available may differ from those shown. So, I towed it to a nearby shop that I called for a quote. Nothing moved inside on the engine, so they assumed it was a broken timing belt. 1986 944 timing belt broke and so did my dream The dash cracked, leaks water in the rain and the seat has begun to rip. in my research I am finding that my truck is a non-interference engine and if timing belt broke while driving that no damage will occur. That is an interference engine. This is not true with freewheeling non-interference engines. At 105,000 miles, the timing belt broke while we were driving. It's a precise art with a high degree of difficulty, but it's best to avoid having your mechanic overcharge you by being timely with your timing belt maintenance. 7L V-6 doesn't show that it needs a belt--so it has either a timing chain and gears or just gears. But like i said there is a possibility that the valves hit each other and bent. Honda does label their engines as interference engines, but: "Given that, in reality the Honda engine isn't a "true" interference engine. Further, even interference engines can survive a broken belt without valve/piston damage, so we couldn't take aneqdotal testimony of "busted belt, no damage" as positive proof of non-interference, either. 0 VCT engine and the timing belt broke. To check the pistons, I would need to pull the heads. Being I do push my engine AND use Seafoam every 60K. 3 in the XTERRAs are interference engines so it is possible to have valve damage. I included a pic of the degreased and washed timing belt covers. ** - Does not include camshaft tensioner hydraulic assembly. Car has 112,000 miles.