I have heard that later y blocks sonic test thinner then older blocks.  I have a 62 292 that I just removed the pistons that are marked .060 over.  I was thinking of having the block sonic tested to see if it would be worth using later?  My question is if the engine is now .060 over would it even be worth checking and saving the block?  What is an acceptable thickness of cylinder walls for a y block?   Appreciate help.

Short answer is yes it is worth saving.

Glen Henderson



Freedom is not Free

Letohatchee, AL

As a general rule, C2AE (292) blocks are good for at least an 0.110” overbore but sonic testing needs to be performed simply to insure that core shift is not going to be an issue.  Starting with the C2AE blocks, the 312 blocks were discontinued as being their own casting which left C2AE blocks being used when production runs of 312 blocks were required.  For this reason, the run of the mill C2AE blocks typically have at least enough material cast in them to make a +060 over 312.  But as I’ve mentioned, core shift is still something to watch for so sonic testing is how this is going to be determined besides knowing exactly how much cylinder wall thickness is available for boring.

Lorena, Texas (South of Waco)

Thanks for the info.  I will get it checked out.

Idaho211

If you do live in Idaho near Boise, you can have your block sonic tested at Performance Solutions on State Street.

Rono

  Ron Lane,  Meridian, ID

Thanks, I live up in Lewiston/Clarkston.