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.

 

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

 

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?

 

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

 

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.

 

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.

 

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?

 

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

 

ttt....

 

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.

 

^^^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.

 

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)

 

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.

 

Correct, is this what you meant?

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

-J

 

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

 

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

 

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

 

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

 

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

Is there any possiblity I could have a bad pump?

 

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

-J