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Timing Chain Service Life

Tank

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Hey folks,
The GT350 Supplement Manual has the following:

Timing Chain
If you use your vehicle extensively at a race
track or at high rpm, it is possible to exceed
the service life of the engine timing chain.
A wrench indicator light will illuminate
when it is time for you to replace your
chain. See an authorized dealer.


Anyone get this? At what mileage? How extensively did you use your vehicle at the track or at high rpms?
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Tank

Tank

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AirBusPilot

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Basically, if you race or constantly beat the shit out of your engine, you'll have more maintenance. Cost of doing business.

At least the service engine "wrench" gives you a warning.
 

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geepaw

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Thinking maybe I should get a set just in case. I keep
My cars a long time.
 

xt6wagon

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I would expect the timing chain to last the life of the car.
timing chains stretch over time, more the more load they are under.

Some engines just lose some power as the timing gets wonky, others have bigger issues.

Given the profile of the cams the GT350 comes with and a high redline, I'd say its wise they made an automated warning if timing chain stretch might be an issue.
 

nastang87xx

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Thinking maybe I should get a set just in case. I keep
My cars a long time.
You'll be fine. I'm betting this is only the case with people who turn their Voodoo engines into legit full on race toys and are tracking many times a year plus street use at average miles per year.
 

autobahnGT350

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Hopefully it does not have a service like a GT3 or Ferrari when it lights up, its time for timing and valevtrain adjustments, costing thousands of dollars. Someone told me that they keep their Ferrari mileage low for this reason, and because they have other sports cars.
 

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xt6wagon

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Hopefully it does not have a service like a GT3 or Ferrari when it lights up, its time for timing and valevtrain adjustments, costing thousands of dollars. Someone told me that they keep their Ferrari mileage low for this reason, and because they have other sports cars.
While it won't be cheap, I suspect it would take so many miles at the race track that it would pale in comparison to the other expenses you had racked up in that time. Don't forget *everything* is a wear item in a race car.

Most other cars take 60+ thousand miles to have meaningful chain stretch. I would expect this to be true for a street GT350, and dangerous chain stretch to take even longer.
 

JAJ

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So timing chains don't stretch, they wear. As links wear, the chain gets longer and the cam starts to fall behind the crank. The cam position sensors will pick that up and turn on a light.

To keep your chain from wearing, you have to keep the loads down and the oil clean. Clean oil is easy - keep changing it. Load control is really rev control. The lower the revs, the less the wear.
 

montreal ponies

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i replaced mine yesterday at 3500 miles...just to be safe...think i'll do it every other oil change
Glad to see that i’m not the only one that does this :doh:
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