Question about 2001 Jeep Grand Cherokee

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It was a couple of days ago when the oil pressure went to 0 psi and then went to the normal position,and it stayed like that for too days,at the present time everything is normal, i checked the oil level it,s ok, no oil leaks,oil sender unit seems ok it,s not leaking, I,m assuming it might be in the oil pressure relief valve, i have a 4.7 V8 and i see that there is alot of people having the same problum, and the temp that day wes at -20 for a three days, i,m thing that the pressure relief valve was sticking, is this possible. Paul

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  • pauldurdle Jan 25, 2009

    Maybe it,s the pressure relief valve causing this problum, lets assume for a moment it is, what do we do? Well lets see.

    1-lets start by cleaning the internal parts, ? lets assume for a moment that there is no damage done to the engine,

    2-We know that oil change might help,or will it?

    3-How do we clean INSIDE the engine without taking the engine apart?

    4-What can we ADD to the OIL to CLEAN the interal PARTS?

    5-If we added a engine cleaning solivent to the oil and drove for about 30min what would happen?

    6-Yah!! Lets give it a internal cleaning MAYBE thats all it needs.

    Last Note,

    Think before you Spend a LOT of $$$$$$$$$$$$$$$

    Sorry about the Spelling, but i think you get the idea.Paul


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Great! oil pressure is at nomal and staying there, did not replace any parts? Engine flush only.

Posted on Jan 28, 2009

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If cleaning the engine does not work, replace the oil press. sending unit. These senders on Jeeps have had a history of problems where they will work one day and not the next day.

Posted on Jan 27, 2009

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