Engine Mechanical problem
2000 Chevy Suburban V8 Four Wheel Drive Automatic 170000 miles
I have a Chey Suburban with a 5.3 liter V-8 that has 170,000 miles on it. Recently the oil pressure has started fluctuating. I have already replaced the oil sending unit and that did not fix the problem. The pressure normally varies between 40 and 60 psi. The fluctuations mainly occur when the engine is idling - the needle on the oil pressure gauge jumps around very quickly at idle. When the engine rpm is increased the oil pressure increases to about 60 psi and pretty much holds steady. Are the fluctuations an indication of a potential problem with the oil pump or could it be the oil pump inlet screen clogged in the oil pan (oil pan has never been dropped and cleaned)? If the oil pump inlet screen is clogged up shoudn't the fluctuations in oil pressure occur at all rpm ranges? Should I even be concerned about this?
have the same problem?
Wednesday, August 19th, 2009 AT 9:40 PM