Thread: Freshly Built 383, Oil question

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Simso, maybe you should pull that engine and go over everything. .027" out the hole and .008" out the hole is way to much tolerance stacking. I got a cheap built 385 on the stand and just to see, I checked mine. This is a standard deck height, .040" over bore with cheap hyper pistons, cast crank, and 5.7 I-Beam rods. No decking, no line bore, cheap, cheap, cheap. My pistons are .024"-.025" in the hole. I checked them all and the .001" could have been me trying to hurry. I checked the block with a straight edge also and it is pretty straight.

I know if I had .019" difference, I would suspect something isn't right. You should be throwing oil all over with the valve covers off. Cam bearings could be shot. I would check all clearances and if you paid these guys to build the short block, I'd go bring it back to them to fix my piston out the hole issue. If they had to deck the block more than .025", they should have started with another block. I could handle a little bit out the hole, but .027" is excessive in my book. I like Zero decked and .039" head gasket but will settle for .025" in the hole and embossed .015" shim gasket.

BTW, that 3 degrees from freezing gave me shivers and goose bumps. Got to go to bed and snuggle up to the wife.

Yeh I live i perth, which is about 2500kms away from where I bought the block from, these guys had a good rep which is why I bought from them and not local. The 4 bolt block prepped with scat crank rods and mogul hypers rings and bearings and cam bearings cost me 3000 aust, the rest cost me close to another 7000 so it hasnt been a cheap exercise. Really not happy if yours is simply standard and within 1" tolerance, it actually pisses me off. Ive been told the reason the block was decked so much is because high comp pistons dont have a good flame front, so what they do is put dished pistons in and deck the block to bring up the compression, that way you get your high comp but you also get a good flame front. The local engine shop wasnt that surprised about the differences but he was surprised that they didnt machine the tops of the pistons to even it all out. And was even more surprised when I said they commented standard quality gaskets would be fine, as this gave me as little as 12" clearance. I went through some old mechanics books I have and the bare minimum they recommend for piston to head clearance was .035". Goddamn not happy
Steve