the oil pressure relief valve, or when to leave it alone

The oil pressure relief valve, or when to leave it alone

The oil pump will pick up the oil from the sump and deliver the volume required, with the surplus returned to the sump via the oil pressure relief valve (PRV). As the engine gets warmer or the speed increases, the oil volume demanded will increase, and to maintain the overall system pressure, less oil will be discharged back to the sump.

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plumbing - pressure relief valve stuck - leave alone or force

plumbing - Pressure relief valve stuck - leave alone or force

You should remove and replace the valve. If you cannot open it using the lever chances are good that it also will not function properly when needed. So you have a dangerous condition. It looks like you have limited space to work in so you may need to remove the downpipe from the valve before you can remove it.

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series 60 - section 3.4 oil pressure relief valve | detroit

Series 60 - Section 3.4 Oil Pressure Relief Valve | Detroit

Oil leaving the pump under pressure passes into the pressure relief valve body. The spring-loaded valve opens when the pressure exceeds 724 kPa (105 psi) and directs the excess oil to the oil pan. The pressure relief valve is attached to the oil pump outlet tube (on 1991 and later engines), or the oil pump body (on pre-1991 engines).

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easy trick for removing the oil pressure relief valve.

Easy trick for removing the oil pressure relief valve.

Ray Vallero of Vallero's VW Werks uses this simple trick for removing the oil pressure relief valve from an aircooled VW engine when it is stuck tight.

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series 60 - section 3.3 oil pressure regulator valve

Series 60 - Section 3.3 Oil Pressure Regulator Valve

Oil Pressure Regulator Valve Parts and Relief Valve Details The valve is held on its seat by the spring, which is compressed by the pin in back of the spring seat. The entire assembly is bolted to the lower flange of the cylinder block and sealed against leaks by a gasket between the block and valve body.

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trouble shooter | low oil pressure vortec | motor magazine

Trouble Shooter | Low Oil Pressure Vortec | MOTOR Magazine

When the oil pump produces too much pressure, the relief valve opens and vents some of the pressurized oil back to the suction side of the pump. Too much pressure is usually a problem only if the oil is too thick when the engine is cold or if the engine speed is very high.

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3 signs of pressure relief valve failure - accutest systems

3 Signs Of Pressure Relief Valve Failure - AccuTEST Systems

Outside of those two concerns, if your pressure relief valves haven’t released, it’s likely that they’ve failed. Contaminants, like dirt, lint, rust, sludge, or even the misalignment of the valve can cause the pressure relief valve to stick.

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