Hell'sChariot

iTrader: (24)

I have a problem. I recently installed a cam and oil pump, and my oil pressure is acting weird. I start the car when its cold it will go to about 45-50psi. And for the first ten minutes of normal driving it goes to 60psi no problem. Once the car is warm, it will idle at 40psi for a short time. But by the time I get to work 25-30 minutes tops its idling at low 20s(22-25). But when you give it gas it jumps up to about 40-43psi instantly. And at WOT wont go over 45, 50 tops. Whats up?

I have already replaced the pick up tube oring, and made sure that it went in smooth. And I did not bolt the pump to the block until after the pickup tube was on and bolted together.

I just dont know whats up. It runs smooth and there is no power loss at all. It pulled like a **** when I did get on it. The only thing out of the oridinary is a wine, like a supercharger belt wine, sometimes.

Any help would be greatly appreicated.

Tainted

iTrader: (9)

ok so youre sure you didnt pinch the little o ring right?

Hell'sChariot

iTrader: (24)

Correct. And when I replaced the old oring, it didnt looked pinched either. Just a little compressed, but that should be normal I would imagine...right?

Tainted

iTrader: (9)

yea at least I would think so. have you been around the oil rpessure sending unit at all?

Hell'sChariot

iTrader: (24)

Yeah. I installed a LS6 intake manifold. Does the sensor go out often? I read alot of people break them when they swap intakes, so I took my time and was careful in feeding the booster hose around it. I too thought it could be the sending unit, but figured if I broke it it wouldnt work period.

Tainted

iTrader: (9)

well if you hit them or bump them it may not totally break it off but can cause it to mal function. it could be the problem but i may not. if you dont get any better advice then swapping it out wont hurt.

Mike94ZLT1

iTrader: (3)

When it malfuctions it usually pegs the needle all the way to the high side, don't think thats it. I bet the o-ring is pinched. What kinda pressure did you get before the swap?

Hell'sChariot

iTrader: (24)

It usually stayed around 40 at idle and cruising, and then went to 60 or higher at WOT.

Hell'sChariot

iTrader: (24)

ttt....

BIG_MIKE2005

iTrader: (116)

Ya know what, mine just did this a couple weeks ago. Turned out to be the oil filter. I did a oil change & it's been fine every since. I'd try that first since it's faster than replacing the o-ring.

Then if that doesn't fix it move on to that repair.

Hell'sChariot

iTrader: (24)

^^^what filter would you suggest? I have a wix on there now.


Could overheating play a role in the pressure doing what its doing. Because for some reason it is overheating.

BIG_MIKE2005

iTrader: (116)

If it's overheating throw a new thermo in there while your changin the oil. I use a Pureone filter. They are supposed to be the best from a test a local guys company did. Here is a link, I got mine at either O'Reillys or Pepboys for under $5.

http://www.pureoil.com/ (i used the white one)

NC98Z

iTrader: (1)

I'm experincing a simular problem. I just changed the oil at 500 miles and put in 10w-30 instead of the 5w30 and it really made no difference. It has been suggested that I hook up a mechanical gauge and get a true reading. Someody said there is a place by the oil filter whereyou have access.

lastcall190

iTrader: (36)

Correct, is this what you meant?

https://ls1tech.com/forums/generation-iii-external-engine/613958-oil-pressure-gague.html

-J

bayer-z28

iTrader: (14)

I'll throw this out there... We had the same problem w/ -=Modified=-'s car...

New thicker Oil pump Oring..
Thicker oil pump o-ring GM# 12557752
https://ls1tech.com/forums/showthrea...0&page=6&pp=20

blkbird

iTrader: (28)

Did that fix the problem?? Im having similar issues as well??

KONG

iTrader: (4)

I am also having the same issues. Hopefully this is a fix for the problem. I am tired of chasing this **** down.

bayer-z28

iTrader: (14)

YEs.. The oil pressure sits FIRM at 60psi now at idle..

This is what it was doing before the new O ring (after install of MS4 cam and PRC stage 1 heads and Ported oil pump -=Mod=-'s car).... BAD valve tick too. I think the O ring fixed that also..

Also see..
http://www.ls2.com/forums/showthread...hreadid=510675
http://web.camaross.com/forums/showt...ght=Vlave+tick

Hell'sChariot

iTrader: (24)

That is the oring I used. I checked my huber chevorlet receipt.

Is there any possiblity I could have a bad pump?

lastcall190

iTrader: (36)

I would try that, cheapest fix at this point and you have nothing to lose except ~5-8 bucks.

-J