Very High Oil Pressure.

[oldshep]

Last week my oil pressure wasn't really too low or too high but was just acting funny on the gauge. So today I changed oil and filters. Now the pressure at cold idle is 60 psi and will go up to 90psi when the engine is ran faster. In the past ive noticed the pressure will go up to 60psi while driving but will never go past.
Now Im worried seals may blow out or something while im driving. I all ready replaced my gauge with a mechanical gauge to rule it out as the problem. Oil pressure regulator? Thanks.

 

[Westech]

could be. There is a spring in there. ITs ez to change out. I would not worry about 90 PSI your not going to blow seals. seals hold back the oil while not under pressure.

 

[Wildchild467]

Tap an oil pressure line off the engine and put a hydro dump box on the back

 

[Floridianson]

Yes put on mechanical one then you can deside to drop reg. and clean.

 

[WillWagner]

Ditto, check the dash gauge against a known good mechanical gauge.

 

[oldshep]

I have a mechanical oil gauge allready installed. How does the regulator exactly work?

 

[Floridianson]

Very easy with springs and pistons like any outher oil pump but the are not in the pump but the side of block.

 

[doghead]

Same truck? http://www.steelsoldiers.com/deuce/32693-little-no-oil-pressure-idle-help-please.html

The oil pressure regulator is on the engine block below the turbo, correct length of the springs are in one of the TMs, not sure which one , I'll have to look it up....TM 9-2815-210-34-2-2....section 4-18.

 

[oldshep]

Yep. same truck. a year later. opposite problem.

 

[WOLFMAN1]

i have a m35 gasser and my oil gage does the same thing. runs at 60 psi and while driving it goes up to 90psi. ni checked my oil and it is always at the same level. it needs a tune up and probably an oil change. anyone know where i can get a oil filter for an old gasser.

 

[OPCOM]

There are two regulators in that thingie. It ought to be taken off, given a good cleaning, oiled up, and put back on.

 

[oldshep]

Yeah I'll likely take it off. The TM shows a mounting gasket. Would RTV silicone be ok it its place? Ive used it alot before.

 

[doghead]

I would not use rtv on that. A clean new gasket would be best, and you may be fine reusing the original gasket.

There are instructions in the TMs on how to R&R the pressure regulator. I posted that info in post#8. This same info was given to you a year ago.

I don't know what you are seeing with your pressure issues but, It is perfectly normal to see an increase in oil pressure with an oil change. Also perfectly normal to have the oil pressure drop some, when the engine is warmed up. Also normal that the pressure drops low at idle.

Some engines stay high, and some drop or vary.

There are two oil pressure gauges available with different ranges. The original was 0-60, the newer ones were 0-120psi.

Have you confirmed you do not have fuel contamination in your oil? Is your FDC bypassed?

 

[oldshep]

I have the TM in printed form and on CD and have done some studying on the reg.. Drove it today. Not really too worried about the pressure anymore. Had 25psi when warmed up at idle and 60-70 going down the highway at 2500rpm. My dash gauge is mechanical by the way.
On this oil change i switched from Rotella to Mobil Delvac 15-40. Who knows maybe its better stuff. Fdc is bypassed and its not ''making'' oil. Maybe it was all in my head but if i do find that something is amiss I'll post it up.

 

[jollyroger]

My guage is the 0-60 and the truck peggs the guage all the time. Sometimes when it's cold out the engine makes 50 psi until the truck warms up enough to idle properly, more than 500 rpm, then it heads north to peg at 60.

 

[99nouns]

I have the TM in printed form and on CD and have done some studying on the reg.. Drove it today. Not really too worried about the pressure anymore. Had 25psi when warmed up at idle and 60-70 going down the highway at 2500rpm. My dash gauge is mechanical by the way.
On this oil change i switched from Rotella to Mobil Delvac 15-40. Who knows maybe its better stuff. Fdc is bypassed and its not ''making'' oil. Maybe it was all in my head but if i do find that something is amiss I'll post it up.

I hate it when "other people's problems sort them selves out" then I get to learn nothing...

 

[Merc1973]

My oil pressure has been high like that since i used NAPA brand oil filter. I think i may try and find some original style, non metal.

 

[frank8003]

so what happens when the filters are "bypassed" or useless?