Question about 2000 Jeep Wrangler

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When the engine temperature is cold the oil pressure will climb depending on the RPM's. If I keep the RPM's below 1800, the oil pressure will remain at 3/4. If I go beyond 1800 RPM's with the engine block cold, the oil pressure will be completely on the right side of the gauge. After the engine warms up, the problem goes away.

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It could be the oil pressure switch.....you might need a new one.....

oil pressure also depends on the thickness of the oil.....you know....thinner oil gets to the engines critical parts faster than thick oil does.

or it could be normal operation of the engine....too

"IF YOU HAPPEN TO START YOUR ENGINE ONE DAY...AND THE OIL PRESSURE GAUGE DOES NOT RISE IN 3-5 SECONDS SHUT DOWN YOUR ENGINE INMEDIATELLY OR IT WILL SEIZE.."

Posted on May 13, 2009

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You need to have a mechanical test gauge hooked up to see if this is a false reading, this special gauge goes into the oil sender tap in the block and will let u know for sure if the pressure is to high cold, if it is the most common issues are wrong weight of oil, do u use oil heavier than 10W-30W? any other oil like 10W-40W will cause high oil pressure readings, the reason is the very tight rod and main bearing clearance's the engines now use, it is only about 1/2 the clearance of older engines, that is so the new fuel saving thin oils can be used.

Posted on May 13, 2009

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