lost oil pressure
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Senior User
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lost oil pressure
i had my oil cooler fixed by a friend of mine today but all didn't go as well as we wanted. after putting everything back together and starting the truck the oil pressure guage on the dash stays down to nothing but comes up if the engine is reved. this caught us by surprise and we are wondering what can cause this problem. please help..any pointers on what to look for will be greatly appreciated. thanks guys.
Mountain Pass
Joined: Dec 2005
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I had this happen to me on a school bus i was working on once. we had like 10 psi at low idle and could only get 20 psi at high idle on a cold engine. Check the pressure relief/regulator valve. its in the oil filter header. Newer engines have a snap ring holding in the disc and spring, on older engines it was just "pinned" in place (basically center punch marks to deform the aluminum an hold the disc in). Check on this. I'm almost certain this is your problem. Also it wouldn't hurt to hook up a real oil pressure gauge to see that your working with.
Posting Guru
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From: Ft Scott
That pic is from Brians 97 so you will see that it has the snap ring holding everything in place, on earlier models the washer was just staked in place with a few dimples in the housing
There need to be 3 pieces in the hole, the spring goes 1st, then the disc and finallly the washer.
Without that valve all of you oil will just bypass the filter and you'll hardly make and oil pressure.
Neither Ford or IH sell those pieces separate, the only way to get them is with a new header assembly or from a parts truck.
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hey thanks alot guys, i'll check this first thing in the morning. so i just remove clean and put back together then? thanks for the pics rodney they were really helpfull.
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well i checked it and everything seems to be inplace. i didn't remove anything but the filter and i think the valve should be good cause i mess with it pushing on it and it seemed like the spring and everything were good. what else should i check for? i have to make a 600 mile trip on wednesday and would like to have it working poperly. thanks for the help so far.
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From: North East Ohio
The dash oil psi gauge is run off the sender on the HPOP reservoir. Run a mech gauge off that port and confirm what's going on.
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well i havent been able to get a mech gauge on it to see what its doing but i did buy a new sending switch at the stealership and that didn't fix nothing. i'm stating to worry a little. what do yall think? is my worry not neccecary.
New User
Joined: Nov 2009
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someone please help me with this oil pressure question???
i was woundering if anyone can help me out. my strokers oil pressure seems kinda low. it sits on the "N" on normal and thats it. doesnt go higher or lower...is that bad? if so what can i do to fix that??
Fleet Owner
Joined: Aug 2004
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From: AZ
Its a dummy gauge, activited by 6psi of oil pressure, thats it.