Does your oil pressure do this?

[19Delta]

My oil pressure stays around 30 until I hit 3,000 RPM and then it will quickly climb to 70 PSI. Does anyone else's do this?

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[ShadowsPapa]

Yes it's a dual stage pump. !00% NORMAL

They do that to save power and fuel. You don't need stupid/crazy oil pressure at lower RPM and frankly, 70 is high, IMO. I'm running 60 on a much higher HP engine.
But back to the question, yes, the pump changes displacement to change volume and boost pressure at above roughly 3500 rpm - or maybe it's 3,000 rpm - somewhere in there.

 

[19Delta]

Yes it's a dual stage pump. !00% NORMAL

That is pretty cool. How does it work?

 

[ShadowsPapa]

I tried to find a picture, this is all I have until I find the photo -


The engine management system determines the oil pressure needs of the engine and commands an electronic solenoid to drive the pump into low or high pressure mode. If the engine is running below 3500 rpm, for example, the pump operates in the low pressure mode to conserve energy. When the engine is operating at more than 3500 rpm, the pump switches to high pressure.

A force balance mechanism inside the oil pump adjusts the size of the pumping chambers to deliver the appropriate oil flow to meet engine demands. If the oil is cold, less oil is needed and the pump reduces the size of the internal chambers. When the oil is hot and gets thinner, more oil is needed. A spring located inside the pump increases the size of the pump chambers. This action helps minimize the amount of energy required to pump the oil.

 

[Trippin01]

yup, What he said.

 

[Rainman519]

ShadowsPapa strikes again!!

 

[JeepTaco]

I tried to find a picture, this is all I have until I find the photo -


The engine management system determines the oil pressure needs of the engine and commands an electronic solenoid to drive the pump into low or high pressure mode. If the engine is running below 3500 rpm, for example, the pump operates in the low pressure mode to conserve energy. When the engine is operating at more than 3500 rpm, the pump switches to high pressure.

A force balance mechanism inside the oil pump adjusts the size of the pumping chambers to deliver the appropriate oil flow to meet engine demands. If the oil is cold, less oil is needed and the pump reduces the size of the internal chambers. When the oil is hot and gets thinner, more oil is needed. A spring located inside the pump increases the size of the pump chambers. This action helps minimize the amount of energy required to pump the oil.

Sounds like the description of a variable displacement piston pump. Nice.

 

[JeepTaco]

^^^ Photo i provided is not of the actual oil pump on these engines BTW

 

[Alaskantinbender]

My oil pressure stays around 30 until I hit 3,000 RPM and then it will quickly climb to 70 PSI. Does anyone else's do this?

Yes mine does as well. Pretty shocking the first time I saw it. The more high teck engines are amazing. My other truck is an old 63 land rover for contrast.

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