Oil press. ??? - JeepForum.com

 
LinkBack Thread Tools
post #1 of 14 Old 11-12-2013, 01:05 PM Thread Starter
Dubfire98
Registered User
1996 ZJ 
 
Join Date: May 2013
Location: Knoxville
Posts: 312
Oil press. ???

Ok so im gonna ask this as stupid as it may be. When i first start my 5.2 at a dead cold start, my oil pressure is around 70psi or so. Today it was near freezing outside and when it first ran at idle the gauge fluctuated back and forth a bit from 20psi-75psi then leveled out at 65psi after about 3 mins. On any typical day it will idle cold at 70psi then as it warms up it will drop to midway when driving on interstate and at a redlight its reading about 30psi or so. Normal? I know some oil pressure is better than none lol.


TN JEEPER
Dubfire98 is offline  
Sponsored Links
Advertisement
 
post #2 of 14 Old 11-12-2013, 01:21 PM
zacko-zj
Registered User
1998 ZJ 
 
Join Date: Oct 2013
Posts: 52
75 is up there. It sounds like your pressure relief valve is not working since that could cause some oil leaks at your oil filter. Before you got too deep in the engine though, I'd replace the oil pressure sender.
zacko-zj is offline  
post #3 of 14 Old 11-12-2013, 01:25 PM
Pierre_r
Senior Member
 
Pierre_r's Avatar
1989 XJ Cherokee 
 
Join Date: Jul 2009
Location: Sweden
Posts: 959
What oilfilter do you use?

Some of the "cheap" brands can make funny things with the oilpressure
Pierre_r is online now  
post #4 of 14 Old 11-12-2013, 01:33 PM
JasonStebbins
Registered User
1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
70 seems a little high, but other then that it sounds completely normal. If you're worried, replace the oil pressure sending unit. What type of oil filter do you use?

Poop
JasonStebbins is offline  
post #5 of 14 Old 11-12-2013, 02:23 PM Thread Starter
Dubfire98
Registered User
1996 ZJ 
 
Join Date: May 2013
Location: Knoxville
Posts: 312
I do believe I'm using a fram filter.

TN JEEPER
Dubfire98 is offline  
post #6 of 14 Old 11-12-2013, 02:28 PM
JasonStebbins
Registered User
1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
Quote:
Originally Posted by Dubfire98 View Post
I do believe I'm using a fram filter.
That's your first problem.

Switch to a Wix, K&N, or Mopar and see if it makes a difference. You don't want a Fram in there regardless.

Poop
JasonStebbins is offline  
post #7 of 14 Old 11-12-2013, 02:34 PM Thread Starter
Dubfire98
Registered User
1996 ZJ 
 
Join Date: May 2013
Location: Knoxville
Posts: 312
Lol dually noted. Where is the relief valve? How its it to change?

TN JEEPER
Dubfire98 is offline  
post #8 of 14 Old 11-12-2013, 02:54 PM
JasonStebbins
Registered User
1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
Quote:
Originally Posted by Dubfire98 View Post
Lol dually noted. Where is the relief valve? How its it to change?
It's part of the oil pump. Doesn't sound like that's your problem since you have adequate pressure. I would put in a different brand oil filter and replace the sending unit. Ten minutes of work and less then $30.00 for peace of mind.

Poop
JasonStebbins is offline  
post #9 of 14 Old 11-12-2013, 02:59 PM
PolkaPower
Registered User
1998 ZJ 
 
Join Date: Aug 2011
Location: The Abyss
Posts: 19,522
Better high pressure than low though. Mine is around 40-50 usually. Just cruising after warm up it may go a bit lower.
PolkaPower is online now  
post #10 of 14 Old 11-12-2013, 03:06 PM
JasonStebbins
Registered User
1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
Quote:
Originally Posted by PolkaPower View Post
Better high pressure than low though. Mine is around 40-50 usually. Just cruising after warm up it may go a bit lower.
I was waiting for a V8 to chime in with their average pressures.

Poop
JasonStebbins is offline  
post #11 of 14 Old 11-12-2013, 03:09 PM
zacko-zj
Registered User
1998 ZJ 
 
Join Date: Oct 2013
Posts: 52
My 5.2 is in the 40-50 range
zacko-zj is offline  
post #12 of 14 Old 11-12-2013, 03:43 PM Thread Starter
Dubfire98
Registered User
1996 ZJ 
 
Join Date: May 2013
Location: Knoxville
Posts: 312
Cruising home today at normal temp I was running around 50-60psi. Idk lol its running fine. Other than I noticed I think my f'n water pump is starting to seep. Thats just awesome when its in the 30s and 40s here now

TN JEEPER
Dubfire98 is offline  
post #13 of 14 Old 11-12-2013, 06:30 PM
rlcii77
Registered User
1998 ZJ 
 
Join Date: Jun 2010
Location: Middleport
Posts: 257
Both of the 5.2s and the 5.9 run at about ~45 to ~60psi at operating temp with engine speed above idle and with engine cold at idle, oil pressure is never less than ~30psi at operating temp., idling... Know what you mean, hurts even more when you bust a knuckle when your hands are cold... But, at least the pain is only momentary, for me anyway...

'94 Limited ZJ (CRUSHED, kept the 5.2L, 46RH & 249 TC)
'96 Orvis ZJ
'98 Slate 5.9 ZJ (DD)
rlcii77 is offline  
post #14 of 14 Old 11-12-2013, 06:44 PM Thread Starter
Dubfire98
Registered User
1996 ZJ 
 
Join Date: May 2013
Location: Knoxville
Posts: 312
Yup I've got around 30psi at idle. Guess everything is fine. Will use a wix filter next time for sure. Ive got 206k on the ol girl now. Having trans rebuilt and bulletproofed next month and also need need a new.control arm kit too. Looking at the IRO arms. Im running 4.5" suspension now. But plan to add some 2" bb to it. Motor seems strong. After I replace the water pump I'm hoping all my leaks subside

TN JEEPER
Dubfire98 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome