Notices
Maintenance & Repair 350Z up keep and diagnosing/fixing problems

Is my oil pressure low?

Thread Tools
 
Search this Thread
 
Old Mar 19, 2013 | 08:59 AM
  #1  
masphx's Avatar
masphx
Thread Starter
Registered User
 
Joined: Jan 2010
Posts: 100
Likes: 0
From: scottsdale
Default Is my oil pressure low?

This is at idle in my 2008 350z base model...

Old Mar 19, 2013 | 09:16 AM
  #2  
TPete19's Avatar
TPete19
Registered User
iTrader: (15)
 
Joined: Feb 2010
Posts: 1,422
Likes: 0
From: Seattle
Default

Please search. This is an extremely common question and has been answered many times.
Old Mar 19, 2013 | 09:45 AM
  #3  
Deteria's Avatar
Deteria
New Member
iTrader: (2)
 
Joined: Jul 2011
Posts: 990
Likes: 4
From: Dallas
Default

Very low. Is that startup idle?

Mine idles above half way mark (60-70psi) after engine has been on for some time. Initial startup idle is around 90psi.
Old Mar 19, 2013 | 09:57 AM
  #4  
HK350 Z's Avatar
HK350 Z
New Member
 
Joined: Mar 2011
Posts: 510
Likes: 7
From: Pflugerville,Texas
Default

I have a 2008 and it has idled arouind 10-15psi after warming up,that looks normal to me if thats after the engine is warm.
Old Mar 19, 2013 | 10:18 AM
  #5  
redline06's Avatar
redline06
Registered User
 
Joined: Jan 2008
Posts: 1,580
Likes: 2
From: Tampa, FL
Default

shiieeettt mine is lower than that at idle when the engine is up to temp, youre fine
Old Mar 19, 2013 | 10:20 AM
  #6  
redline06's Avatar
redline06
Registered User
 
Joined: Jan 2008
Posts: 1,580
Likes: 2
From: Tampa, FL
Default

Originally Posted by Deteria
Very low. Is that startup idle?

Mine idles above half way mark (60-70psi) after engine has been on for some time. Initial startup idle is around 90psi.
Thats way too high my friend
Old Mar 19, 2013 | 10:35 AM
  #7  
andrew's 350Z's Avatar
andrew's 350Z
Registered User
iTrader: (3)
 
Joined: Mar 2010
Posts: 519
Likes: 1
From: lancaster California
Default

Start up im around 80-90psi. After warm up at idle its right around 20psi. Cruising the freeway at about 70mph its around 60psihave an 04btw.
Looks like its fine.
Old Mar 19, 2013 | 10:43 AM
  #8  
masphx's Avatar
masphx
Thread Starter
Registered User
 
Joined: Jan 2010
Posts: 100
Likes: 0
From: scottsdale
Default

Here is what it was idling at. This is after a 20 mi drive on the freeway in 80 degree AZ weather this morning...


Old Mar 19, 2013 | 10:49 AM
  #9  
redline06's Avatar
redline06
Registered User
 
Joined: Jan 2008
Posts: 1,580
Likes: 2
From: Tampa, FL
Default

At operating temp oil pressure should be 14psi at idle and 43psi at 2K rpm (no load), on an HR that is

Last edited by redline06; Mar 19, 2013 at 10:51 AM.
Old Mar 19, 2013 | 11:51 AM
  #10  
winchman's Avatar
winchman
Registered User
 
Joined: Sep 2009
Posts: 2,335
Likes: 5
From: Georgia
Default

^^ That's the minimums. More is better. Mine runs 30 at idle and 60 at 2K when fully warmed up. I'm using Pennzoil Ultra 5W-30.
Old Mar 19, 2013 | 01:08 PM
  #11  
jc21's Avatar
jc21
Registered User
iTrader: (11)
 
Joined: Oct 2011
Posts: 389
Likes: 0
From: Sylmar
Default

I have an '03 and mine is about the same during idle, and that is when the motor is fully warmed up as well. Initial cold start up it'll be about 80 psi give or take, and then during warm temps when the motor is all good and warmed my oil pressure sits about the same as yours. Im using Pennziol Platinum 5w-30, but im switching to castrol full synthetic

well all in all I say that yours is in normal condition.
Old Mar 19, 2013 | 01:10 PM
  #12  
JERZ350's Avatar
JERZ350
Registered User
iTrader: (2)
 
Joined: Jun 2010
Posts: 610
Likes: 4
From: Roseland, NJ
Default

That's normal idle pressure when warmed up operating temp. Cold start idle will be anywhere from 70-90psi and continue to fall as it warms.
Old Mar 19, 2013 | 01:20 PM
  #13  
masphx's Avatar
masphx
Thread Starter
Registered User
 
Joined: Jan 2010
Posts: 100
Likes: 0
From: scottsdale
Default

Thanks for all the responses. Been using Mobil-1 5w-30 synthetic for the last three or four oil changes.
Old Mar 19, 2013 | 02:21 PM
  #14  
laurentj23's Avatar
laurentj23
Registered User
iTrader: (1)
 
Joined: Jul 2008
Posts: 333
Likes: 0
From: Duluth
Default

Did you check the oil?
Old Mar 19, 2013 | 02:37 PM
  #15  
350zsunshinefl's Avatar
350zsunshinefl
Registered User
iTrader: (1)
 
Joined: Dec 2007
Posts: 970
Likes: 2
From: fl
Default

switch to amsoil, will work wonders on oil pressure
Old Mar 19, 2013 | 04:18 PM
  #16  
Darkside Mojo's Avatar
Darkside Mojo
Registered User
 
Joined: Apr 2011
Posts: 731
Likes: 0
From: Right behind you, with a knife
Default

Holy god! 80 degrees iin the morning?!? screw it, i'm moving there.
Old Mar 19, 2013 | 04:25 PM
  #17  
jerryd87's Avatar
jerryd87
Registered User
iTrader: (4)
 
Joined: Nov 2010
Posts: 2,439
Likes: 10
From: NE ohio
Default

not really, not going to have any issues, cold start mine is over 120 psi and hot idle is 60 psi although i have deleted the squirters

Originally Posted by redline06
Thats way too high my friend
Old Mar 19, 2013 | 07:23 PM
  #18  
Carter86's Avatar
Carter86
Registered User
iTrader: (2)
 
Joined: Aug 2007
Posts: 82
Likes: 0
From: Atlanta
Default

Im having the same issue here. I just replaced my oil pressure sending unit also.

I did an ECU reset yesterday and it seems like idles low and the PSI is very close to 0.

I checked the oil level and its fine. I did oil change replaced my oil pressure sending unit at the same time about 400 miles ago. I did search and found nothing.

Mine is 04.5 VQ35DE Non rev up
Old Mar 19, 2013 | 07:47 PM
  #19  
HK350 Z's Avatar
HK350 Z
New Member
 
Joined: Mar 2011
Posts: 510
Likes: 7
From: Pflugerville,Texas
Default

Originally Posted by masphx
Thanks for all the responses. Been using Mobil-1 5w-30 synthetic for the last three or four oil changes.
I use the same and have been the last 70K miles I have put on the HR.
Old Mar 19, 2013 | 07:50 PM
  #20  
jc21's Avatar
jc21
Registered User
iTrader: (11)
 
Joined: Oct 2011
Posts: 389
Likes: 0
From: Sylmar
Default

I agree with redline06, for some reason I find yours to be too high as well. i think 120 psi on cold start is not common at all. My cold start is at around 70-90 psi and my normal temp idle is about the same as op's oil pressure.

Originally Posted by jerryd87
not really, not going to have any issues, cold start mine is over 120 psi and hot idle is 60 psi although i have deleted the squirters

Last edited by jc21; Mar 19, 2013 at 08:03 PM.



All times are GMT -8. The time now is 02:36 AM.