Originally Posted by Bob Dillon
I don't think anything but pulling the engine makes sense. With the engine on the stand, you can disassemble it an mike everything, and know for sure what parts you need.
A bad crank will wipe out new bearings in a heartbeat, and you can't inspect the cylinder walls for scuffing correctly.
The oil pump is run off the crankshaft nose and is filled with vaseline while the engine is down. My manual says failure to pack it thusly may cause the pump not to prime.
We have seen people replace the bearings before with results that were worse than what they started with...
If the oil pump is being reused, and has not be dissassembled, then it should be primbed and will not need to be packed... How ever if you rebuild an engine I do reccomend a new oil pump...
I have had the entire cover off of my 91, the oil filter and the like all intact, all I did was clean the cover and replace the front seal... Put the car all together and had imidiate oil pressure when we started it up... I have yet to see any issues with the gyrator style oil pumps, if the pumps aren't taken apart...
This can get very touchy when you tear an engine down... And again when you rebuild I do reccomend a new oil pump( The whole timming cover as a reman, so that all of the tollerances in the pump will be correct)
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