'94 GTR-32 V SPEC II (RB26DETT) - Erradic oil pressure - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Wookie384 · 02-01-2009, 10:24 PM

My buddy has a problem with his R32, after a little driving his oil pressure drops to anywhere from 1cm^3 to almost zero. When the car initialy starts up its anywhere from 3 to 4 cm^3. He believes it would be either the oil pressure sensor or maybe even the oil pump acting up. Since I lack expirence with RB26's, would any of you have any suggestions on how to diagnose the problem? Thanks in advance!

mikez97 · 02-01-2009, 10:25 PM

might be the oil pickup

projectRDM · 02-01-2009, 10:54 PM

Erradic oil pressure? Never heard of that. Erratic oil pressure though could be debris in the pickup or in one of the ports through the engine, like a piece of RTV that broke off from one of the many places it's used to seal.

Yellow4g63 · 02-02-2009, 12:14 AM

Or it could be the oil pump drive. It's a known problem with the RB motors.

*brndck* · 02-02-2009, 12:21 AM

i would start by getting a mechanical oil pressure gauge on the motor
snap on sells a dope kit with many different fittings.

you plug it in place of your stock oil pressure sender.
this will tell you whether or not you're really getting low oil pressure or just have a bad sender

*fliprayzin240sx* · 02-02-2009, 05:53 AM

Quote:

Originally Posted by brndck

i would start by getting a mechanical oil pressure gauge on the motor
snap on sells a dope kit with many different fittings.

you plug it in place of your stock oil pressure sender.
this will tell you whether or not you're really getting low oil pressure or just have a bad sender

^^^Until you manage to get something like this...DONT BOTHER STARTING IT TILL YOUR SURE YOUR NOT REALLY HAVING OIL PRESSURE ISSUE!!!

Monooxide · 02-02-2009, 06:25 AM

Metal shavings are the only souvenir of your stock block...

punxva · 02-02-2009, 07:04 AM

main bearings, if you have good pressure and its not the oil pump, pickup or dent in the pan. this happened to my motor, it would have good oil pressure when started, then after a few mile of driving it would start to go down a few psi until it was warm then dropped fast.

*fliprayzin240sx* · 02-02-2009, 05:28 PM

This was the same way i blew my last SR. I was getting 3 bar, which sounds great right? But not at fucking redline...i was barely getting half a bar at idle. Needless to say, rod knocked. Now im on a rebuild and im slapping some fucking oil cooler on it, to keep the oil happy.

liv2drift045 · 02-02-2009, 05:52 PM

three is way too damn low should be around 6/7 at cold start, 2 at idle, i say ithe oil pump is on its way out... same thing happened on the rb20 in my cefiro, same thing happened to my friends gtr... like flip said/ don't run that car anymore until this is fixed

MisawaJason · 02-02-2009, 06:28 PM

I've owned 2 BNR32's. It's a VERY common for 32 oil pressure sensors to act up/go out on owners. My first GTR acted like his symptom, it would read fine at startup but after the car was running for about a minute it would drop to almost zero. Aftermarket oil pressure gauge read normal pressures. If he can source a new OEM sensor, tell him to get it

Oh yeah, my statement is only true if he's getting the readings he is talking about from the stock oil pressure gauge in the cluster. If he's getting those readings off of an aftermarket gauge, then it's another problem

Wookie384 · 02-02-2009, 07:47 PM

Quote:

Originally Posted by 8ggalant

three is way too damn low should be around 6/7 at cold start, 2 at idle, i say ithe oil pump is on its way out... same thing happened on the rb20 in my cefiro, same thing happened to my friends gtr... like flip said/ don't run that car anymore until this is fixed

I've been told that oil pump's are known to give out often on RB 's so this is definitely one possible peoblem, The car is parked until this is figured out.

Quote:

Originally Posted by MisawaJason

I've owned 2 BNR32's. It's a VERY common for 32 oil pressure sensors to act up/go out on owners. My first GTR acted like his symptom, it would read fine at startup but after the car was running for about a minute it would drop to almost zero. Aftermarket oil pressure gauge read normal pressures. If he can source a new OEM sensor, tell him to get it

Oh yeah, my statement is only true if he's getting the readings he is talking about from the stock oil pressure gauge in the cluster. If he's getting those readings off of an aftermarket gauge, then it's another problem

This is another possible problem we're considering since I've also been told that the sensor is another possible culprit. He is using the OEM guage on the cluster, so maybe upgrading to an aftermarket guage would't hurt?

Quote:

Originally Posted by punxva

main bearings, if you have good pressure and its not the oil pump, pickup or dent in the pan. this happened to my motor, it would have good oil pressure when started, then after a few mile of driving it would start to go down a few psi until it was warm then dropped fast.

Hopefully its not the bottom end giving out this car, but thats not rueld out either.

I'll take everybody's advice and I'll keep you guys posted, if anyone has any other tips please chime, I'll talke as much advice as I can get. Thanks guys!

MisawaJason · 02-02-2009, 09:08 PM

buy or borrow an aftermarket gauge to check it before going out and buying an expensive ass oil pump or another 26

blu808 · 02-02-2009, 09:22 PM

Oil pumps are not known to fail on the rb engines. The r32-34 engines all use the same pump.

The r32 rb26dett's have a problem with their oil pump drive. If that fails you would see 0 oil pressure.

Luke

02-01-2009, 10:24 PM	#1
Wookie384 Zilvia Addict Join Date: May 2007 Location: N. Hollywood / Burbank Age: 39 Posts: 766 Trader Rating: (10) Rides Gallery: Wookie384 Feedback Score: 10 reviews	'94 GTR-32 V SPEC II (RB26DETT) - Erradic oil pressure My buddy has a problem with his R32, after a little driving his oil pressure drops to anywhere from 1cm^3 to almost zero. When the car initialy starts up its anywhere from 3 to 4 cm^3. He believes it would be either the oil pressure sensor or maybe even the oil pump acting up. Since I lack expirence with RB26's, would any of you have any suggestions on how to diagnose the problem? Thanks in advance! Last edited by Wookie384; 02-04-2009 at 11:08 PM..

02-01-2009, 10:54 PM	#3
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 50 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	Erradic oil pressure? Never heard of that. Erratic oil pressure though could be debris in the pickup or in one of the ports through the engine, like a piece of RTV that broke off from one of the many places it's used to seal. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

02-02-2009, 12:14 AM	#4
Yellow4g63 Zilvia FREAK! Join Date: Jan 2003 Location: Socal Posts: 1,454 Trader Rating: (5) Feedback Score: 5 reviews	Or it could be the oil pump drive. It's a known problem with the RB motors. __________________ 95 240sx RB20 415whp 91 Nx2000 VVL yo

02-02-2009, 05:28 PM	#9
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	This was the same way i blew my last SR. I was getting 3 bar, which sounds great right? But not at fucking redline...i was barely getting half a bar at idle. Needless to say, rod knocked. Now im on a rebuild and im slapping some fucking oil cooler on it, to keep the oil happy. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

02-02-2009, 05:52 PM	#10
liv2drift045 Zilvia FREAK! Join Date: Feb 2005 Location: Chicagoland Age: 41 Posts: 1,483 Trader Rating: (7) Rides Gallery: liv2drift045 Feedback Score: 7 reviews	three is way too damn low should be around 6/7 at cold start, 2 at idle, i say ithe oil pump is on its way out... same thing happened on the rb20 in my cefiro, same thing happened to my friends gtr... like flip said/ don't run that car anymore until this is fixed __________________ StreetSliders.Blogspot.com

02-01-2009, 10:25 PM	#2
mikez97 Leaky Injector Join Date: Jun 2008 Location: florida Posts: 100 Trader Rating: (0) Feedback Score: 0 reviews	might be the oil pickup

02-02-2009, 06:25 AM	#7
Monooxide Zilvia Addict Join Date: Mar 2005 Location: Farmington/Flint, MI Age: 36 Posts: 675 Trader Rating: (8) Feedback Score: 8 reviews	Metal shavings are the only souvenir of your stock block...

02-02-2009, 06:28 PM	#11
MisawaJason Zilvia FREAK! Join Date: Nov 2007 Location: South Korea Age: 39 Posts: 1,320 Trader Rating: (13) Feedback Score: 13 reviews	I've owned 2 BNR32's. It's a VERY common for 32 oil pressure sensors to act up/go out on owners. My first GTR acted like his symptom, it would read fine at startup but after the car was running for about a minute it would drop to almost zero. Aftermarket oil pressure gauge read normal pressures. If he can source a new OEM sensor, tell him to get it Oh yeah, my statement is only true if he's getting the readings he is talking about from the stock oil pressure gauge in the cluster. If he's getting those readings off of an aftermarket gauge, then it's another problem

02-02-2009, 09:08 PM	#13
MisawaJason Zilvia FREAK! Join Date: Nov 2007 Location: South Korea Age: 39 Posts: 1,320 Trader Rating: (13) Feedback Score: 13 reviews	buy or borrow an aftermarket gauge to check it before going out and buying an expensive ass oil pump or another 26

02-02-2009, 09:22 PM	#14
blu808 Post Whore! Join Date: Dec 2002 Location: Campbell, Ca Age: 41 Posts: 5,010 Trader Rating: (3) Feedback Score: 3 reviews	Oil pumps are not known to fail on the rb engines. The r32-34 engines all use the same pump. The r32 rb26dett's have a problem with their oil pump drive. If that fails you would see 0 oil pressure. Luke __________________