Piston impressions

[i_taz]

I'm cleaning out my cylinders from a leaking valley pan and see .04 stamped on the pistons but measuring with one of those cheapo digital calipers from the top not a dial indicator down the bore I get 4.342. Does that sound about right ?

 

[Steve340]

What do you think it should be?
What motor?

 

[Chryco Psycho]

440 bore is 4.32 , .04 is 40 thou over

 

[moparleo]

It always helps to give complete info.

 

[i_taz]

Sorry, it was a 440... Wonder if that's a good thing. Since there seems to be a problem sealing the valley pan my primary purpose was to measure the CC (83) to see if the heads were cut. The first time I replaced it, it definitely helped and that was with a different intake. I didn't want to pull the heads to clean the valves but thought better of it when a couple bolts started leaking on top of the pan and I would be doing it again.