Question about 1996 Jeep Grand Cherokee
A few things come to mind lets start with the easiest first and that would be a bad oil filter along with old thinned out motor oil, change the oil and filter and see what happens on your pressure gauge.
Secondly it could be the strt of a bad oil pump...wear between the impeller gears and the pump housing, this coukld be a bit of an expense as the oil pan would have to be removed to obtain access to the pump, once you have that pan down check the oil pick up strainer, if the oil has been neglegted it may be impacted with sludge, clean out, pull the oil pump apart and have an engine rebuilder tech check the pump for wear and scores in the pump housing gears and bore walls, if scored replace the pump.
Do not....I repeat....Do not flush your engine out with any of those engine flushes you can buy in the parts store, high mileage vehicles can only be cleaned statically and the best way is to rebuild the engine or replace it with a newer lower mileage unit if it is really plugged up, knocking and clunking.
Which brings me to a different state of mind on this matter of engine flushing....ok here it is....if you already know that the engine is going to get replaced due to excessive sludge build up from poor oil change etc. maitanence, then and only then would I try a quart can of engine flush....use as directed...what is the worse that can happen the motor wipes out??? Well we just agreed it was going to be replaced anyhow...how about the positiv point...it corrects the problems by freeing up all the oil lubrication passages throughout the interior of the engine, if that is the case and the flush fixes it, I would add new oil new filter and a can of dura lube to the engine to try and enhance the lubrication cycle.
Hope this all helps.
Posted on Jul 15, 2010
Most likely cause is a worn oil pump and worn main bearings ,try a new oil filter and oil then put a can or two of STP or wyns oil treatment in and sell it quick
Posted on Jul 15, 2010
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Posted on Jan 02, 2017
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