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All overhead cam engines require either belt or chain maintenance. On my Mercedes cars, you change the chain at 100K. They screwed up and went to a single link chain from a double in the early '80's. They were replacing engines over that screw up - chains broke at 60K. My sister had to have the belt changed on their 4 cylinder Infiniti at about 60K and it cost about $600. Ferrari's are supposed to have theirs changed at around 25K. And on the later models, the engine has to come out to do it. Now there is a design for you.
Any small displacement engine that puts out any kind of horsepower has an interference type engine. They all require belt and chain maintenance. It's either this or pushrods.
Porsche, and Germans in general, produce well thought out vehicles. Do the maintenance, enjoy the car.
By the way, it is impossible to predict the life of a chain or belt in the field so to speak. There are too many variables. So you give it a big safety factor. Ditto for metal fatigue. That's why crucial parts are Xrayed in some industries.
The cars are not for the ham fisted.
Last edited by Lawrence Coppari; 08-22-2002 at 03:58 AM..
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