you got me!!!!!!!! since it was doing it before rebuild , I still say its in the block such as a crack opening up under heat or something , if its pumping then its leaking somewhere....you didn't say about distributer seals on shaft???

I am thinking a oil passage is cracked somewhere in the block, This job is now costing me money, Lossing my A$$ on this one. No lifter bore's checked out great engine had 134,000 before rebuild.



''JUST MY TWO CENT'S WORTH''

i would lean towards that too :cry:

The oil pump bolts up just like chevy, to rear main cap, same type of oiler shaft etc, Just don't have any other answer.

for what its worth,ran into a chevy that start to leak out the rear of the block at about 7 years old through porosity in the casting at rear of block. anythings possible.

Hey i am open to any answer i am going to print these suggestions and try all tomorrow, at this point i want rid of this thing driving my nut's and right now that is a short drive :lol: :lol: this $2000.00 rebuild is heading to $3500.00 if i have to buy a new block.

if your luck is like mine, they could make 100000 of something with 1 defective & damn if that one doesn't end up being the one I get stuck with :roll:

I think it would be cheaper to buy the truck :!: :!:

you shouldn't be eating the cost of the block, the labor is bad enough

Do the rockers ride on a shaft like the B blocks? If so, is the shaft gunked up? After the engine cools, does the oil pressure return? The base where the pump bolts on may be uneven or flexing when the block warms up, that would allow the oil to spray in the pan rather than thru the system. Grasping at straws on this one.