high oil pressure
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high oil pressure
My '85 F150 L6 300 has constant high oil pressure. Is this a problem?
The stock gauge reads at the far rigt of the normal range, from startup, to highway driving, it never changes until I turn off the engine. I just changed the oil and filter, pressure is the same.
The stock gauge reads at the far rigt of the normal range, from startup, to highway driving, it never changes until I turn off the engine. I just changed the oil and filter, pressure is the same.
Hotshot
Joined: Oct 2002
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From: The Big, Oregon
high oil pressure
The stock gauges are unreliable- try an aftermarket mechanical-type gauge. They are much more accurate, and give the pressure in psi, rather than Low Normal and High. Also, if anything, changing the oil filter would make the pressure reading go up, as it is read after the filter.
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From: Virginia
high oil pressure
I will tell you an interesting experiment I discovered when I first got my truck. The engine was knocking like crazy, but the factory oil pressure guage seemed to never go much below half-way. Of course I was saving for a new engine, but I happened to be listening to the radio one day, and noticed the guages worked on the accessory key position. I looked at the oil guage and it was reading where it normally does, and the engine was not runnning!
I agree about the aftermarket oil pressure guages.
I agree about the aftermarket oil pressure guages.
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high oil pressure
Yesterday I got an aftermarket guage from actron. The directions are somewhat unclear for a newbie like me. There are two sets of directions one for Microprocessor Controlled Engines and one for other engines. Which one do I use? Where is the warning light sender? Please help. Thanks.
Brian
85 F150 I6 300
Brian
85 F150 I6 300
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From: ND
high oil pressure
brianoki, on all the oil gauges I have ever installed all I have had to do is take out the stock oil sending unit, replace it with the new oil sending unit (after routing it throught the firewall), and finally wiring the light so that it works when the headlights are turned on. Not sure what the warning light sender is??? I am assuming that this guage has some sort of warning light for low oil pressure? Maybe someone else can shed light on that part of your question.
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From: Virginia
high oil pressure
"warning light sender".... I think the instructions are assuming the vehicle you are working on has a idiot light, not a factory guage like yours. It doesn't matter.
Problem is, I know where the factory sending unit is on a small v8, but not the six (sorry).
See if I am guessing right about the two sets of instructions. Does one recommend taking the original sending unit("light sensor") out, while the microprocessor instruction set tells you to buy a tee fitting and keep the original factory sensor in place? Some vehicles with electric fuel pumps run the fuel pump power through a oil pressure switch, so you have to keep it functional, while adding your new guage line too.
Problem is, I know where the factory sending unit is on a small v8, but not the six (sorry).
See if I am guessing right about the two sets of instructions. Does one recommend taking the original sending unit("light sensor") out, while the microprocessor instruction set tells you to buy a tee fitting and keep the original factory sensor in place? Some vehicles with electric fuel pumps run the fuel pump power through a oil pressure switch, so you have to keep it functional, while adding your new guage line too.
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high oil pressure
franklin2,
You are correct. One set says leave the sensor in with a tee connector, the other set says take the sensor out. I did some research and found out where the sensor was. I went ahead and did the install without the sensor. Now the truck is idling real rough, so what you said about the fuel pump makes sense. I gues I'll be buying a tee fitting tomorrow. Thanks everyone for all your help.
You are correct. One set says leave the sensor in with a tee connector, the other set says take the sensor out. I did some research and found out where the sensor was. I went ahead and did the install without the sensor. Now the truck is idling real rough, so what you said about the fuel pump makes sense. I gues I'll be buying a tee fitting tomorrow. Thanks everyone for all your help.
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From: Mechanicsville
high oil pressure
I usually change out the oil pressure sending unit, water temperature sending unit, and the gauge voltage regulator on my Fords every fifty thousand miles. Never yet had a gauge fail.
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high oil pressure
well, I've had the mechanical guage on for a few days now. How much oil pressure is considered normal? I am showing about 50 psi at startup and about 25 - 30 psi at full engine warm up.
Also, there is quit a bit of air in the tube going to the mechanical guage. Is it necessary to bleed out that air, or is the guage unaffected?
brian
'85 F150 I6 300
Also, there is quit a bit of air in the tube going to the mechanical guage. Is it necessary to bleed out that air, or is the guage unaffected?
brian
'85 F150 I6 300
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From: Virginia
high oil pressure
The air in the line doesn't affect the guage.
If you are running down the road, and have 25-30 psi, your engine has some miles on it, but nothing to worry about.
If you have 25-30 psi at a warm idle, that is very good oil pressure and the engine is like new.
If you are running down the road, and have 25-30 psi, your engine has some miles on it, but nothing to worry about.
If you have 25-30 psi at a warm idle, that is very good oil pressure and the engine is like new.
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