Oil pressure droping
Oil pressure droping I've got a 02 SS I bought with most of the mods already done it's got a forged 347 from tsp w 5.3 heads and it's got a ported LS6 oil pump. When I start the car it holds about 60 psi and it slowly drops and after about 15 mins its down to 0 psi. I figure it's pumping all the oil out of the pan and the oil's not making it back to the pan. Anyone ever seen this problem before?
Thanks
Luke
Thanks
Luke
How many quarts did you put in it?
If it was at least four, you would have oil all over the place if it wasn't making it back to the pan.
Sounds like your oil pump install is bad (o ring).
It is a common error/problem.
If it was at least four, you would have oil all over the place if it wasn't making it back to the pan.
Sounds like your oil pump install is bad (o ring).
It is a common error/problem.
how much oil and what thickness. bad o-ring would bleed pressure from the beginning I would think. To me it sounds like wrong oil or a bad pump. As the oil warms and thins, the pressure drops.
What oil is in the car and how much?
What oil is in the car and how much?
Hows the sending unit have u replace that? Oh dose it start to tick or knock when the oil pressure goes down?
Last edited by OUTLAWZ RACING; Dec 13, 2008 at 06:19 PM. Reason: hmmmm.......
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Brett Foote Ohh... Dam Are you 100% sure there is nothing in the pan or the pickup is loose? What about the cam retainer I know if that is loose you will loose oil pressure. The only other thing is bearings. Oh what about the barbel by pass thing it may have come out.
Joined: Aug 2007
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From: Turnin' Wrenches Infractions: 005
if its fine cold then drops off as the motor warms up i would suggest a pressure relief spring. i have had those exact same symptoms on another car i had. replace the pump.
I had a new pump from the dealership crap out after 1500 miles. The relief valve was stuck. I pulled the pump apart and the bottom of the relief valve had a bur around it. What a bunch of crap. Tear the front of the engine down and get a good look at things (cam retainer, pump, pump o ring, and the little freeze plug in the front) If nothing then I'd take the rear cover off and check the barbell out. Good luck with it.
I agree with everyone else; don't drive or even start it anymore until the problem is fixed. It could be something as simple as the oil pump o-ring or something more serious. Either way, you will have to tear it down for an inspection.
Bad o-ring wont have good pressure when cold....
I personally would be swapping to a new oil pump and start back up with 20w50 in it and see what happens. Check for bearing material in the oil when you drain it
I personally would be swapping to a new oil pump and start back up with 20w50 in it and see what happens. Check for bearing material in the oil when you drain it
I vote bearing cam or main. I had a 5.3 do the same thing new pump fixed it for like 1 day right back to the same thing. My repair in the end pull the bastard out and install a 6.0
I'd say its too late. You shouldn't let it run with 0 oil pressure. Thats got spun bearing written all over it. If it's started to knock, its only going to get worse and you have a bottom end knock now. I would have tore the front cover off and replaced the pump when you had the chance. Sounds like you will be doing a rebuild now.