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  #13  
Old 06-09-2012, 06:40 AM
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Re: Oil Pressure??

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Originally Posted by Zetzsche248 View Post
Whats the normal range for Oil Pressure for the 4.7's....Mine Runs 60 Cold and then 40-60 warmed up.Good Numbers????
Pretty normal numbers. Can vary depending on outside air temps, oil weight, oil filter, etc. I have 155K on my 4.7 and those are typical oil pressure readings.
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Old 06-09-2012, 06:43 AM
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Re: Oil Pressure??

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Originally Posted by DrLocke View Post
My '04 WJ I6 "oil pressure" gauge sits at approximately 42#'s no matter if it is at idle or running at freeway speeds. Should I be concerned?
I had a similiar issue several years ago (4.7l) with the oil pressure virtually static at ~40psi. Replaced the oil pressure sender unit and all was well once again.
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Old 06-10-2012, 11:09 AM
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Re: Oil Pressure??

Old school is you need 10psi for every 1000 rpm, ie 2500 rpm= 25 psi.
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