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Unread 11-12-2013, 01:05 PM   #1
Dubfire98
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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.

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Unread 11-12-2013, 01:21 PM   #2
zacko-zj
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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.
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Unread 11-12-2013, 01:25 PM   #3
Pierre_r
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What oilfilter do you use?

Some of the "cheap" brands can make funny things with the oilpressure
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Unread 11-12-2013, 01:33 PM   #4
JasonStebbins
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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?
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Unread 11-12-2013, 02:23 PM   #5
Dubfire98
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I do believe I'm using a fram filter.
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Unread 11-12-2013, 02:28 PM   #6
JasonStebbins
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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.
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Unread 11-12-2013, 02:34 PM   #7
Dubfire98
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Lol dually noted. Where is the relief valve? How its it to change?
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Unread 11-12-2013, 02:54 PM   #8
JasonStebbins
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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.
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Unread 11-12-2013, 02:59 PM   #9
PolkaPower
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Better high pressure than low though. Mine is around 40-50 usually. Just cruising after warm up it may go a bit lower.
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Unread 11-12-2013, 03:06 PM   #10
JasonStebbins
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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.
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Unread 11-12-2013, 03:09 PM   #11
zacko-zj
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My 5.2 is in the 40-50 range
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Unread 11-12-2013, 03:43 PM   #12
Dubfire98
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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
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Unread 11-12-2013, 06:30 PM   #13
rlcii77
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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...
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Unread 11-12-2013, 06:44 PM   #14
Dubfire98
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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
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