Torque Specs on ZL1

[Steve_Hoog]

Does anyone have the torque specs for a 69 ZL1, and are there any special things to do during assembly that are out of the ordinary from a regular block?

[bbdon]

https://www.yenko.net/ubbthreads/show...o=&fpart=1

[Steve_Hoog]

I did a quickie search of the archives and didn't find that thread, but thank you that is right on what I needed.

Steve

[Steve_Hoog]

One more question please, has anyone ever heard of warming the block up before torque? Either by hot water or space heater. Some one told me this, and wanted a second opinion on it. Seems to me room tempature would be best. Since heat should expand it, when it cooled back down you might have a less than accurate torque?

[bbdon]

I don't know much about ZL1s, but I have always liked to retorque head bolts and exhaust manifold bolts after running the engine for a while.
I have read somewhere that the bolts are all longer on the aluminum engines, and that why you can apply the same torque as on a iron engine without stripping the threads.
But I'm not the expert. Fortunately, I happen to have recieved something nice in the mail today. So here is what the Motion Performance Chevy Performance guide had to say on this subject back in 1971.