Question about Cars & Trucks
Hi Lee, There are two oil pressure relief valves on most vehicles. One is fitted onto the oil pump assembly and another onto the oil filter housing assembly. The oil pump pressure relief valve is located at the front of the engine and is accessed via a blind nut on the side of the unit. The bolt is in the form of a cap, which when removed can be seen to be holding down under tension a spring, which in turn presses the valve. If the pressure becomes too high the valve body is pushed upwards and releases an amount of oil, thereby maintaining the required pressure. The valve built into the oil filter housing works in much the same way, but its job is to allow oil circulation in the event of a blocked oil filter. regards John
Posted on Feb 11, 2012
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Posted on Jan 02, 2017
the oil pressure switch is on pssenger side, lower engine area,beside oil filter, mounted in engine block. The pressure relief valve is in the oil pump, in which case, you have to drop the oil pan,and take off the oil pump.
Posted on Jan 31, 2009
I'd suggest using a good brand of synthetic oil (which was actually developed a really long time ago for the armed forces for use in polar reigions) Most flushes loosen too much material all at once, causing blockage of the oil pickup screen. You can get a bit more cleaning and lubrication protection by adding a bit of marvel oil to the synthetic. Change just the filter (and lost oil) about every 1500 miles, till the problem subsides.
Posted on Jan 25, 2009
SOURCE: OIL PRESSURE RELIEF VALVE
If cleaning the engine does not work, replace the oil press. sending unit. These senders on Jeeps have had a history of problems where they will work one day and not the next day.
Posted on Jan 27, 2009
The oil pressure relief valve should be on the oil pump.If your oil pressure is ok,have the wiring tested to theswitches or try another set of clocks
Posted on Sep 16, 2009
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Sep 08, 2011 | 1990 Toyota Pickup
Oil pressure should be around 30 at idle and then sit at 60 when engine is above 2,000 RPM. If pressure varies at all engine speeds it indicates a sticking pressure relief valve which is located within the oil pump. You could try using some oil flushing product in the engine oil before the next oil change to see if it removes the gunk that is causing the valve to stick. If that does not improve it you should see a mechanic about replacing the relief valve.
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