High Oil Pressure??
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Elder User
Joined: Feb 2003
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From: Coleman, Wisconsin
High Oil Pressure??
Just installed an oil gauge and it says that i have 55 psi at idle. I did a search and found out that this engine is suppose to have around 40-60 at 2grand. So is 55 at idle too high? If so, what is the solution if one is needed. Thanks.
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Elder User
Joined: Feb 2003
Posts: 871
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From: Coleman, Wisconsin
High Oil Pressure??
It was around 55 at both cold and warm idle. I thought about that too so I took it for a ride to warm it up but it was still the same. It gets a little over 60 when revved up.
Posting Guru
Joined: Apr 2003
Posts: 1,153
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From: Venezuela
High Oil Pressure??
You should check what oil are you using, this is a normal pressure on SAE 20W50 but it can cause overheated oil pump and premature wear. Be sure you are using appropiated oil.
Moreover, there are some aftermarket pumps that are designed to provided always pressures betwen 45 - 55 psi at any RPM or oil temp.
Regards;
Moreover, there are some aftermarket pumps that are designed to provided always pressures betwen 45 - 55 psi at any RPM or oil temp.
Regards;
Postmaster
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From: shepherd
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Senior User
Joined: Sep 2003
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From: Houston TX
High Oil Pressure??
Mine runs about 50-55 all the time. Idle or at cruise. The engine is rebuilt and only has about 3400 miles on it. So I assume that is what a tight 300 usually runs with that pump I used. "Totally stock Melling, if I remember right". It's not a high output, or volume pump. I'd say you are in good shape. The common thought is as long as you see 10 lb's per 1000 rpm, you are ok. I'd call that a minimum though myself. More is better, and usually is the case unless your bearings, etc are about shot. MK
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Joined: Sep 2003
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High Oil Pressure??
I wouldn't worry about a high reading as long as you are getting oil to the top end and all the critical componets. A high reading along w/ some rough running or high temps could be a sign of something else that's not right. Blocked oil passage. I wish I had 60 lbs in my engine. Just my thoughts.
Post Fiend
Joined: Jan 2000
Posts: 5,860
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From: Metro Detroit (Redford)
High Oil Pressure??
I guess I would be concerned if it is that high at idle when warmed up. My 1990 E350 motorhome with 460 V8 is running 70 cold and hot is 60 at 2000 and 30 at idle. But there is a lot of variation between vehicles. My '95 300 I6 runs about 53 cold and hot runs around 38-40 at 2000 and 16 at idle (700 rpm). Also I would avoid diesel oil. There are a lot of good oils for gasoline engines. I use Valvoline semi-synthetic Durablend 5W30. If you want a heavy duty oil, you might try one of the "high mileage" oils that have recently come out.
Posting Guru
Joined: Apr 2003
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From: Venezuela
High Oil Pressure??
Diesel oil is not good idea for gasoline or gas engines. Each oil use different kind/amount of additives. Diesel oil have specific additives for diesel fuel, same for Gasoline and Gas (LPG or propane)
Regards;
Regards;
Senior User
Joined: May 2003
Posts: 203
Likes: 1
High Oil Pressure??
Dont reccomend "high milage" type oil as it contains seal sweller aditives that swell your seal ( to reduce oil leaks ) and when you stop using it your seals sag and leak more ( the seal wears out quicker when swollen ).
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