My car is a 1991 nissan skyline R32 GTR, stock engine RB26DETT. I chose the 240sx because there was no category for skylines.
I just recently traded cars, and I'm now doing all the regular maintenance. I just did an oil change w/filter, using mobil1 5w-30 full synthetic. Since then, the oil pressure hovers around the 2-3 kg/cm^2 range on a cold start. When the engine heats up, its drops to 1, or even lower :s. I have the car parked right now, and im really hoping its not my oil pump. Hopefully somethings wrong with my stock gauge... oh and the car is completely stock, other than exhaust and a turbo timer. plz help.
hey thanks alot elmo35 & transit360. I was recommended 5w-30, but Ive done a bit of reading, and apparently 10w-40 is commonly used in these cars as well. And i put in a FRAM oil filter, and apparently napa makes one thats way more preferred. Looks like ill be doing another oil change, if the problem is still present ill hook up an aftermarket gauge.
hey thanks alot elmo35 & transit360. I was recommended 5w-30, but Ive done a bit of reading, and apparently 10w-40 is commonly used in these cars as well. And i put in a FRAM oil filter, and apparently napa makes one thats way more preferred. Looks like ill be doing another oil change, if the problem is still present ill hook up an aftermarket gauge.
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With the car warmed up, oil pressure should be 1.5 kg/cm^2 @ 800 rpm. If your not getting that much, you may want to get an oil pressure gauge (mechanics type) to check it. Using this type of gauge will give you an accurate reading. The stock gauge may not be very accurate, especially if the sending unit is old.
Always confirm your readings from your gauges with another tool. In this case, you need to attach an oil pressure gauge to the sending unit, or even tap into an oil pressure line with a T fitting.
This will tell you if it is INDEED low pressure. Don't get worried until then.
If low oil pressue is confirmed, then it could be you oil pump, but it could also be worn main bearings or other worn parts, resulting in loose tolerances and therefore low oil pressure.
So doublecheck the pressure first. Then go from there.
Also, if the synthetic is a thinner viscosity than factory, then or course the oil pressure will be lower. You can try using a higher viscosity in the meantime to increase your pressure.
The handheld gauges are not expensive, and you can use them for fuel gauges also. Or you can borrow it.
Well asuming you used the right oil filter and grade of oil then you need to verify with a mechanical gauge (not the one on the car) if your oil pressure is low then youll need to replace rod and main bearings and oil pump but first make sure your oil filter is right then put another on to make sure its not a pressure relief valve in the filter good luck
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Hi
sounds like the turbo is pulling oil through, have you noticed any difference in power or smoke from the exhaust? if so then the oil seals are shot in the turbo.
the R32 + 33 skylines are good motor cars, from a 2nd hand point of view, make sure they have been maintained and not excessivly modified, as a nissan mechanic the biggest problem with the skylines are when people increase the turbo boost without bigger intercoolers or fuel systems, this will eventually destroy the motor.
If you can find one, buy an unmodified one, or one that has been modified correctly.
Also be aware the timing belt and platnum spark plugs neede to be replaced every 100,000km or 60,000miles, this can be an expensive job...
put a vacuum gauge on the engine,the needle should fluctuate back and forth, take a timing light and instead of putting on the number one plug put it on the plug wire with the problem.point the light at the gauge if the needle looks like it is steady you have a problem with one of the valves or the cam shaft.
xmarquez: I do not think so. The two vehicles are configures differently if I am not mistaken. The Skyline's are Rear wheel drive vehicles and the engine is an in line configuration.
Your car is a front wheel drive where the engine is transversely mounted and it's a V-6.
I would also love to have a Skyline turbo. They are AWESOME!
Sorry. ........................
could be detonation if the cylinders run a diagnostic on the ecu. the rb26 is sophisticated enough to give very detailed info about it. if its a big problem ill buy the engine... just tossin that out there....
bauer s22: Talk about frustration? I spent 10 minutes giving you an answer and when I went to post it, the screen went gray and it asked me to confirm the entry with numbers and letters and then click ok. O kept doing it and then it goes. THIS PAGE HAS EXPIRED!!!! ARRGH!
I'll give it a shot again.
Here would be two simple ways you could check the turbos out.
1. Get a screw driver with a "LONG" shaft.. 2 feet or more. it must be thin like the most common phillips screw driver. The handle should be like the smaller one as well. If you don't have one, get a reasonable facsimile. With a friend working the throttle, place the metal end on the turbo, fairly close to the center where the intake and exhaust housing come together. Put the other end to your ear. You want to have you ear solid to the end of the handle. The screw driver will actually act like a stethoscope. The long shaft seems to magnify the sound. You do both turbos.
2. Remove the hoses from where they clamp onto the intake side of the turbo. Carefully, with your index finger and thumb, hold the tip of the turbo shaft and see if it does more than rotate. It should only rotate. If there is any axial play, then the bearings are failing. Also look for oil around the opening of the turbo and in the hose. If you find any oil, then the seal in the turbo has failed and what will occur, is the oil will contaminate the Catalyticconverter as well as possibly harm the o2 sensor,
The r32 is a healthy engine and typically runs 12 pounds of boost or more. I would highly suggest buying a boost gaugewhich (if possible one which has vacuum (VDO) and will read at minimum 20 psi.
You need to invest in a turbo timer if you don't have one. If you do not practice allowing the car to sit and idle for a minute or more prior to shutting the engine off, you will fry the oil in the turbo. Every time the engine is shut down, it will actually get hotter before it cools down this is why it s important to allow it to idle a little after running boost.
Anyway, If I can help, I am familiar with a lot of the aspects of the toy you have. I am truly jealous!
Just ask and I do my best. I'm a Nissan Master tech and have been swing iron on these products since 1968.
Using this type of gauge will give you an accurate reading. The stock gauge may not be very accurate, especially if the sending unit is old. 
hey thanks alot elmo35 & transit360.
I was recommended 5w-30, but Ive done a bit of reading, and apparently 10w-40 is commonly used in these cars as well. And i put in a FRAM oil filter, and apparently napa makes one thats way more preferred. Looks like ill be doing another oil change, if the problem is still present ill hook up an aftermarket gauge.
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