Question about 1999 Daewoo Nubira
1.6 engine: can oil pressure relief valve be replaced without removing oil pump? Air con and powersteering pump bracket appears to be in the way. If so, will pump still prime OK after replacing valve. Book says to pack pump with petroleum jelly. Has anyone had oil leaks caused by faulty valve making pressure too high? We had an oil leak between head and block near gallery. Have removed head, and are wondering if we should replace the pressure relief valve. Any ideas welcome.
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Posted on Jan 02, 2017
SOURCE: If the oil pan is
Not necessary to be primed with petroleum jelly. The oil pump will be primed itself only with engine oil after few turns of the crankshaft, when cranking the engine by the starter motor, then when engine idling. You should check out the engine oil level by the oil dipstick. Fill up with oil allways below the "Maximum" level. Never exceed the oil "Maximum" level on the dipstick!
Posted on May 11, 2011
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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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