I have my 02 SSEi in the shop today to repair the intake manifold gaskets (leaking antifreeze). Is there any recommendation by the GM to replace the timing chain at any given mileage? I had the timing chain changed on my 92 Bonneville SE at about 150k miles and my mechanic told me it was sloppy loose and it was a good thing we changed it when we did.

Also, if it is a good idea to change it out at a given mileage, would it make sense to change it out while the current repairs are being done (sorry, I'm not much of a mechanic, but if I can save some money by changing it while things are apart, I'll do it ... I plan on keeping this car for a while).

Cheers!

I just found this post that appears to answer my question. I missed it my first time around. For reinforcement, does this post represent the general consensus of forum members that are "technically savvy"?

Thanks and cheers!

The timing chain is in a totally different location than anywhere the mech will be going to fix the intake gaskets...he'd have to take the harmonic balancer and the front cover off; I'd guess he'd charge you for another 3 or 4 hours' labor at least.

I say wait a few months...you'll get bit by the mod bug, decide to cam the motor, and THEN you can swap the timing set

(P.*., what part of DE are you from?)

(P.P.*., I think you meant to link a thread, but I see no link)

Dover.

Yes, I forgot to include the link. Here it is. It pretty much states there is no need to change it.

http://www.bonnevilleclub.com/forum/...t=timing+chain

Thanks.

I pulled mine and replaced it last year (the car I beat on daily) at 125k. There was no significant wear or stretch.

Normally with timing chains, you should change them out at about 150 K miles
Timing belts need to be changed much more frequently but metal chains last longer with proper lube change intervals.
If you are replacing valvetrain components with higher lift and heavier springs ie. cam change. You should replace the chain and go with a heavier duty unit.

I replaced mine at 100 K miles and they weren't that bad but their was noticeable wear.
Always replace both sprockets with the chain and in the 3800 case, the tensioner also.