Question about 1983 Dodge Pickup
Why can't I get the oil pump off to replace?
Posted by Anonymous on
Any engine that cannot produce at least 15psi pressure at idle likely has a pressure loss at the crank bearings (most commonly connecting rod bearings) You can check the clearance by using plasti-gage on them once you have the pan removed.
Most times the pump is blamed for the loss of pressure but actually the pump likely has some scoring inside the housing and on the gear ends that has been caused by bearing material getting in there.
If you replace the pump alone, some pressure will be restored but that will go away quickly as more bearing material is ingested.
The pump should be replaced along with the failing bearing shells (actually best to replace all). If main bearings are worn (rare) engine will need to be removed for that service.
Always re-check bearing clearances before re assembling the engine. If any are still out of clearance, you may want to use an oversize bearing there. After checking or replacement, always re-torque anything that was removed.
Clearance specifications can be found in any good manual.
Posted on Jun 03, 2010
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