How long should the timing chain last? a diagnostic has sugested a timing chain problem.mileage is 37000.

If a change point is specified it will be found in the vehicle service literature supplied with the vehicle when new - or give the dealer a call.

Timing chains are more durable and longer lasting than timing belts - as long as the maintenance intervals are observed and good quality engine oil is used. Mostly replacement is required when the chain becomes noisy though some installations are so efficiently guided and tensioned a noisy chain, even when badly worn, is unlikely and so it is wise to remove the top cover periodically after a high mileage to check the chain for wear over the cam sprockets.

There is no mileage interval for a timing chain. It should not have to be replaced unless there is a problem with it/guides. They should last the life of the engine under normal operating conditions

If you have a timing chain (as apposed to a timing belt) you don't need to replace it at any interval, it will last the life of the engine.

Your replace the serpentine belt when it is worn, cracked, or appears to need replacing. It should easily last 100,000 miles. The 2002 Taurus has a timing chain and not a belt which will last the life of the engine.

The Nissan Altima does not use a timing belt, it uses a chain driven camshaft, timing chains have no set mileage and should last the life of the engine.

chains are not like belts.... they are much tougher therefore last a hell of a lot longer...typically around 90,000 miles or more they should be looked at as they do eventually stretch and can jump time...they also have tensioners that can wear out causing the chain to jump a tooth, and a tell tale sign of this wear is indicated by noise coming from the timing chain case area.I have seen some 3.8 v/6 engines one in particular manufactured by Buick/Olds and installed in early CJ 5 Jeeps lasting over 200,000 miles...but sounding like a washing machine at idle from all the worn parts as well as some having a fiber type cam sprocket that wears out(used to help silence any gear slap noise)Hope this somewhat helps.

relax -- the nicest thing about a timing chain is that it should last as long as the engine does . . .

The 22re timing chain is a double roller and last the lifetime of the car they are bullet proof however the chain tensional is another thing altogether.