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Engine Oil Pressure


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J Charlie Carr
New User

Aug 19, 2015, 1:26 PM

Post #1 of 6 (674 views)
Engine Oil Pressure Sign In

Jeep Wrangler 6 cy automatic oil pressure gauge light comes on when idling after engine water temp warms up. When cold the oil pressure is 55 and holds to 40+ while driving. When water temp builds to 210 degrees, and brought to idle, the light gauge comes on. After stopped at idle and return to driving, building speed back to 30 mph the light gauge goes off. Had the sensor changed and a new oil pump but the problem remains. Mystifying!


Tom Greenleaf
Ultimate Carjunky / Moderator
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Aug 19, 2015, 2:05 PM

Post #2 of 6 (663 views)
Re: Engine Oil Pressure Sign In

The top answer if the pressures are correct is engine bearings (bad news) are worn beyond specs. Usually the beginning of the end for that engine................ But..............


A couple other things could do this if pressure is accurate and should be checked with a gauge on engine not dash gauge.


1. Gasoline getting in oil can thin it out way too much and do that. Not good new if that either.
2. Totally wrong viscosity oil and of substandard oil way overdue too many times for changing it.


Verify it mechanically. If just common and worn to this point some fake junk can buy some time. If real it's in the fast lane to more and more problems till it croaks on you,


T



Hammer Time
Ultimate Carjunky / Moderator
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Aug 19, 2015, 3:13 PM

Post #3 of 6 (658 views)
Re: Engine Oil Pressure Sign In

You might want tom try a different brand of oil and different brand of filter.



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J Charlie Carr
New User

Aug 19, 2015, 5:12 PM

Post #4 of 6 (648 views)
Re: Engine Oil Pressure Sign In

Engine oil pressure has been checked to hold at 9 lbs pressure when in idle


Discretesignals
Ultimate Carjunky / Moderator
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Aug 19, 2015, 5:35 PM

Post #5 of 6 (644 views)
Re: Engine Oil Pressure Sign In


Quote
Engine oil pressure has been checked to hold at 9 lbs pressure when in idle


Is that when the light is on?


Spec is 13 psi at idle. What year and how many miles? Any recent engine work done besides an oil pump? Engine overheated or ran without oil at any time?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Aug 19, 2015, 5:37 PM)


J Charlie Carr
New User

Aug 19, 2015, 6:35 PM

Post #6 of 6 (639 views)
Re: Engine Oil Pressure Sign In

Engine did over heat last summer. Mileage is 115,000. No other major engine repairs.

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