5.4 oil psi problem
#1
5.4 oil psi problem
I have a 2009 F-250 90,000 miles, lost oil psi, starts oil psi comes up but when engine gets to about 1500-1700 rpm it drops and light comes on, shut engine down and re start oil comes up same thing happens again, changed oil pump, timing chain adjusters and oil and filter no change. checked pick-up tube and installed a gage no difference oil psi still drops. any idea's?
#5
I found some small pieces from the adjuster in the pan, the cam phazers have been bad for a wile, the hydraulic adjuster seals were blown out, thought that might be the problem. can't find anything wrong with the oil pump and still put a new one in. what I can't get through my little pea brain is why do I have good oil pressure at start up and when it gets to 1500-1700 RPM drops to zero. seems like a cavatasion problem or the oil is dumping over somewhere this all started on a - 30 winter day but this is the first time in 90.000 miles and we get a lot of -30-40 days up here. thank you for your help M.C.
Last edited by mcfarmer; 02-21-2014 at 11:15 AM. Reason: missing word
#6
I'm inclined to think that there is debris that is continuing to get sucked up on the pick up screen of the oil pump. Shut it off & it settles down & doesn't become a problem until it runs long enough to draw it back onto the pick up screen. In short you need to pull the oil pan & clean it. Then check oil flow to the heads
Last edited by enriched&beyound; 02-21-2014 at 05:39 PM. Reason: more
#7
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#8
#9
I'm inclined to think that there is debris that is continuing to get sucked up on the pick up screen of the oil pump. Shut it off & it settles down & doesn't become a problem until it runs long enough to draw it back onto the pick up screen. In short you need to pull the oil pan & clean it. Then check oil flow to the heads 4 6 lifter valve noise restricted oil to right side head cam and lifters - YouTube
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