Zero oil pressure at idle
Thread Starter
Teching In
Joined: Sep 2012
Posts: 22
Likes: 0
From: Armada, MI
Zero oil pressure at idle Bought a cheapo 5.3 to drop into my Jeep as a temporary motor, previous owner said it had 135,000 miles on it.
I replaced the rod bearings, and head gaskets.
Started it up, and i have no oil pressure at idle. Maybe 5-7PSI at about 1100rpm.
Pulled the valve covers, 2 or 3 rocker arms have some oil pushing out of them, the rest are dry. Valve train isn't crazy noisy, but there is a little bit of noise.
Checked with 2 manual gauges, at both the cooler adapter, and the stock sender location. Both show the same.
Barbell plug is still in place under the back cover. Noticed a little bit of oil running down from the rear cam bearing.
Swapped in a new Melling M295 pump, with the proper O-Ring, still has the same issue.
Any ideas?
I replaced the rod bearings, and head gaskets.
Started it up, and i have no oil pressure at idle. Maybe 5-7PSI at about 1100rpm.
Pulled the valve covers, 2 or 3 rocker arms have some oil pushing out of them, the rest are dry. Valve train isn't crazy noisy, but there is a little bit of noise.
Checked with 2 manual gauges, at both the cooler adapter, and the stock sender location. Both show the same.
Barbell plug is still in place under the back cover. Noticed a little bit of oil running down from the rear cam bearing.
Swapped in a new Melling M295 pump, with the proper O-Ring, still has the same issue.
Any ideas?
TECH Apprentice
Joined: Apr 2013
Posts: 367
Likes: 4
From: eastern nc
no oil pressure question when you replaced oil pump .on right haND side of oil pump mouting surface .there a plug look like a small freeze plug .was it still tight .if not oil wil just keep returning to the pan .when i replace oil pump i packed plug with jb weld.
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Teching In
Joined: Jan 2012
Posts: 27
Likes: 0
From: NewRoads Louisiana
If the motor has been sitting for time and some debris have got in it the filter may have clogged instantly. Happened to a friend of mine. After changing sensors, pump, and all that we changed the filter and there it was.
I doubt this is your case, but worth a thought
I doubt this is your case, but worth a thought
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