Ok guys, here is the thing......for the second time, my truck has broken her 2nd timing chain....causing the valves to kiss the pistons and bend the hell off. To all the people I know, only to my truck has happened this.

I searched the forum to help me decide which timing chain to get cuz I ain't trusting the stock one no more. Someone sells me the double roller for $100 brand new, but I also read that you need to make modifications, shim the oil pump, and have a little trouble aligning the pick-up tube and I don't want to go through all that. I saw some of you guys saying that you got the ls2 chain and I'm thinking that I am going with it myself.

Anyways, does anybody have a clue why this happen? Have any of you had to go through this also?

 

dotn know why dude, but 2 times does suck, if the double is to much trouble i'd def stick to the ls2 chain,

this was on the tsp website,

http://temp.corvetteforum.net/c5/pew.../ls2_chain.jpg

 

Do you like bouncing it off the rev limiter a lot? If so that could cause extra stress on the chain and cause it to stretch or break.

 

No, I do shift it right. You know anybody else that has happened this to'em?

 

damn that sucks. how many rpm you turning? go w/a ls2 chain next time.

 

I have had LOTS of gi perf small and big blocks...never broke a timing chain. If you're having a problem I'd buy the best one don't scrimp cause you don't wanna have to do it again. I assume you have a aftermarket cam? Could the cam be walking forward and binding/breaking the chain?

Dave

 

That is strange. I've been on this site and others for bout 3 years. You are the only one I have read about breaking a timing chain. Let alone 2. Makes me think something is wrong in the valve train. Someting binding? Very stiff valve springs? Dunno... but this is highly unusual I would say.

 

Is there a possibility the chain is getting out of alignment? What im getting at is there a possibility that the bolts on the cam are comming loose or is there a possibility your bearings are so fried that your main bearings are letting the crank move or something. Just throwing out some possibilities.

 

Try using a timing chain dampener. You can get it from GM. Originally all gen 3's were going to have them but the bean counters scratched the idea. However I know the 2004 GTO's came with them, cause that's what my parts guy looked at to find this one. It's only about $15 and that's just cheap insurance. It also comes with bolts I believe.

 

I've read that some blocks already have the holes for the dampener too, but most need to be drilled and tapped. Maybe an LS2 timing chain and dampener might be a nice budget upgrade.