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Anjou -> RE: Timing Belt, how often should I change it (10/2/2006 11:01:23 AM)
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quote:
ORIGINAL: eatinguy Gotta step in on this one. One of my customers had this same mantra on his 02 GTI with 119k on the clock...his timing belt went out and the valvetrain fell to pieces...shards of metal got into the combustion chamber and damaged the rings...needs whole new longblock. While I understand where you are coming from leaving something alone until it gives you a hick-up, there is a such thing as 'preventative maintenance.' Would you go without changing your oil in the engine or trans until it's 'worn out,' just because it ain't broke yet? Nuff said. Even if you spend the $400-700 (absurd but true) to have the dealership do your timing belt at the 75k mark, you still walk away far better off financially than my buddy who has to cough up $3800 for a new longblock plus labor...or eat the $6k he still owes on the car he loves and trade it for something newer. My $0.02. Not trying to bash, but for God's sake be logical! Anjou's setup with 180k and original timing belt is...please pardon the pun...on borrowed time! -eg There are two types of engines that use timing belts. They are described as: "Interference Engines" and "Non-interference Engines" The difference lies in the proximity between the valves and the pistons. On an interference engine, if the timing belt slips even one notch, the piston can crash into an open valve causing serious engine damage by bending valves and breaking pistons. For non-interference engines, if the belt breaks, the pistons and the valves won't collide like they do in some cars (like the '02 VW GTI you mentioned?). You must have missed the section in my reply that stated you FIRST need to know what will happen if the timing belt breaks (in other words, do you have an interference or non-interference engine design). I also pointed out that my timing belt is inspected annually by a qualified mechanic to verify that it is in good condition. By inspecting the belt, I have a reasonable assurance that the belt will not break, and if it does, I have verified that I have a non-interference engine, so in the worst case, I'll be stranded somewhere (an inconvenience for sure), but the engine will not suffer serious damage. So you see, I am in fact using sound scientific principles and logic. Where is the logic in an owner's manual that informs the owner to change a component after X miles whether it's worn out or not? 1996 VW Jetta GLS, 2.0L Gas Engine, Manual 5-speed, with 235,000 miles on the original engine and clutch. Now that's living on borrowed time, but I plan on keeping it until it's actually worn out. Some have suggested, my mechanic included, that the time has come for a new vehicle, but I still get 35-40 MPG on the highway.
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