I have changed oil and filters used heavier weight oil changed oil pump had bearing checked and was told they were worn engine sounds great when cold but knocks when warm and oil pressure drops. I get oil pressure when driving if I leave the truck in gear being it's a manual and let off the gas but when gas pedal is pressed oil pressure drops again, also when shifting I have oil pressure untell i press in the clutch and nothing and then it builds again untell I have to shift again, all this when engine is warm. When cold sounds and runs beautifully, reads normal oil pressure can I fix it with a rebuilt and any idea what that might cost? Buying a rebuilt engine or getting the engine i have now rebuilt?
2007-07-12 16:33:26 · 4 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
When you had the bearings checked did they remove the oil pan?
If so why didn't they replace the main and rod bearings and also the oil pump(hi volume) at that time . that would have tightened the bottom end up a bit and boosted the oil flow.
The oil pump could be failing and needs replacing.
on one of our stock cars the block was porous and lost oil pressure when warm . the fix was an epoxy coating in the block . A better /cheaper fix is a new block
Yours sounds like a thrust bearing or oil pump is the problem.
The thrust surface on the crankshaft could be worn excessively the fix for that is a new crankshaft.
2007-07-12 17:15:47 · answer #1 · answered by Robert F 7 · 0⤊ 0⤋
it does sound like it needs a real good re-build job done on it even though i have seen them go a lot farther on miles without needing re-built.that would help re-store the oil pressure on it,but you,ll have to have cam bearings and everything done to it,more than likely your loosing the majority of the pressure through the main bearings,that's where the pressure starts out from,if it doesn't hold it their it wont hold any where else,miles age,and fatigue will get any engine in time,it will probably cost you around 1200 to get it re-built right,but its probably worth it,especially if you plan on keeping the truck,and that's a lot cheaper than buying a new one these days,i think id consider having this one built,it sounds like its worth putting the money in to,and it would pay for its self in a little while,and if your like me id rater drive an older one any way as a newer one,good luck with it hope this helps.
2007-07-12 16:45:26 · answer #2 · answered by dodge man 7 · 0⤊ 0⤋
That old is not worth the cost of replacing motor, next it will be the transmission or rear end. Buy a newer one.
2007-07-12 16:40:51 · answer #3 · answered by James B 5 · 0⤊ 1⤋
Drive it untill it dies.
Then buy a Chevy.
2007-07-12 16:55:35 · answer #4 · answered by Mr. KnowItAll 7 · 0⤊ 1⤋