Thread: Failed LS7 4 times

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Originally Posted by Flatblack 57

Each rebuild was mic'd correctly by guys who know. Last builder was fully aware of this oiling prob and went to great effort to find the problem with the parts. Only the block, crank and bare alloy heads were reused. Everything else new and expensive. Block was decked, honed, aligned and the bores cleaned up. Crank crack tested, ground, check for straight. Pat, I was after your advice earlier, but eric has steered me to a World 9.8, 4.25 x 4.5. We'll do 8.4 comp and run an 871. Hopefully this will bring back the smile

what is it ? are you asking whats wrong with the block you have. is it to 4.500 bore ? or are you buying a new engine from eric ? if so why ask the old block you have could have two things that are wrong with it 1 is when they bore it they cut in to the main oiling galleys if it a mark 4 block or the lifters are not rigth and the oil hole is up past the lifter bore at full lifte. but i would say some one did not know what they were doing ? and it could be a over look thing like the distributor if it has a slip coller not set up right and not driving the oil pump. but you would of never had oil psi but if you did have it and lost it i would say it was set up to tight if your burning the bearings out of it .big blocks really do not have oil problems