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Oil Pressure On A Gtr

frankxinyu

By frankxinyu,
in General Maintenance

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arbess Experienced

arbess

Posted
Posted

Mine sits around 4 in the morning for warm up. Once the oil gets to 80-90*C it will then drop down to around 2 i think. after a long day it will idle under the first bar (Not the zero bar obiously). I have been told that when its low after a long day, its ok because oil is all over your engine and doesnt need to be pumped at high pressure.

Other wise the guage is stuffed. =) See a mechanic to know when your oil pump is on its way.

bye

whitesky Contributor

whitesky

Posted
Posted

interesting post guys. My 32 GTR and one of my best mates with same car, have totally inconsistent readings.

I usually have 4 on warm cruise, but some times after idle ( at lights etc) it barely makes 2. I get a bit concerned and stare at it, then 10 seconds later its 4. ( irrelevant of revs )

Never the same each day.

We have come to the conclusion that the standard guages are a bit dodge.

The best way to put your mind at rest is to put in an aftermarket guage.

I have a Greddy one on the way, will tell u how it goes.

Dont sweat, it may just be the guage.

frankxinyu Mentor

frankxinyu

Posted
  • Author
Posted

thanx for your input guys!

started up my car this morning and the oil pressure was up to bloody 6. then it drops back to around 3. Then during hot times in the afternoon after ive been driving it, it sits at just above 1. it got me worried coz someone was telling me basically my engine is stuffed and a rebuild is needed. but i dont see any smoke or nothing coming out of the zorst, also the engine runs really smoothly without any miss firing or undue noise. so i guess its all right then.

getting the car checked out next week, so ill know for sure. at the mean time, i was told 1 bar is the low end of ok zone, as long as the oil pressure light is not on. again, as someone said, it could be the sensor or gauge, or even bad oil.

any way, ill let u guys know. cheers!

djr81 Grand Master

djr81

Posted
Posted (edited)
thanx for your input guys!

started up my car this morning and the oil pressure was up to bloody 6. then it drops back to around 3. Then during hot times in the afternoon after ive been driving it, it sits at just above 1. it got me worried coz someone was telling me basically my engine is stuffed and a rebuild is needed. but i dont see any smoke or nothing coming out of the zorst, also the engine runs really smoothly without any miss firing or undue noise. so i guess its all right then.

getting the car checked out next week, so ill know for sure. at the mean time, i was told 1 bar is the low end of ok zone, as long as the oil pressure light is not on. again, as someone said, it could be the sensor or gauge, or even bad oil.

any way, ill let u guys know. cheers!

Before you rush off & start replacing anything do a search for oil pressure - there are about a bazillion posts on the subject.

A couple of things:

The oil pressure will always be higher on a cold engine thatn on a warm one because the oil has a higher viscosity when cold.

The oil pressure sender unit on the Nissans is known to be rubbish. It will send erratic pressure readings to the gauge. Hence before you get anything removed check the pressure sender unit either by substituting it with a known good one or by getting a mechanical gauge put on the car by your mechanic as a test.

The overwhelming probability is that the send unit is stuffed & the engine is fine. It will cost maybe a couple of hundred dollars if you want to replace the sender unit, but most people don't even bother doing so.

Edited by djr81
HR32_GTS-T Rising Star

HR32_GTS-T

Posted
Posted

personally i would never go by a factory fittef oil pressure gauge, for one skylines always seem to have problems with them, just save a lil money mate an get a fairly good quility aftermarket oil pressure gauge. Depending on brand/ size, ur looking around 80- 140 bucks.

beefy Proficient

beefy

Posted
Posted

A lot of the Oil Pressure Gauges on GT-Rs are faulty. Mine sits on just under 3 most of the time but some days it sits under 2. Restart Car and it is back up to just under 3.

Also depends on the Oil you use. The Full Synthetic Oil will usually make the reading a bit lower.

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