Ls oil pressure

What kinda oil pressure do you got at cold start and then at operating temp? When is it too low for an ls. Have heard 6 lbs was enough at idle.

Re: Re: Ls oil pressure

Good rule of thumb is 10lbs per 1k rpm

6lbs sounds low. pretty sure my buggy idle's at about 40 psi. it has a modified oil pump from texas speed. my wife's tahoe with a stock 5.3 idle's around 30psi.

My low pressure indicator light comes on at 20psi. Occasionally it will flicker at cold start for a second or 2. I rarely see pressures below 30psi.


2010 Jim's Garage 4429
2012 Jim's Garage YJ
2013 Wide Open Design WFO

Cold start 40 PSI @ idle. Warm 28 PSI @ idle. Jumps up to 60 quick! 6 PSI is too low IMO.

Blase said:

Cold start 40 PSI @ idle. Warm 28 PSI @ idle. Jumps up to 60 quick! 6 PSI is too low IMO.

Click to expand...

Bombshell is identical to this. Stock pump.

If low indicator pops measure the gap from the pickup tube to the floor of the pan also. Clay or play-dough works well. The o-ring on the pickup tube should be a noticable "pop" of sorts into the bore, if you dont feel the little give in it then it may not be sealing properly.

NO WAY on 6lbs! NO WAY!
Anything under 20 is questionable, under 15 is somethings wrong.

Remote oil filter?

I have never had one go below 30lbs at idle.

My Denali with the 6.0 idles near 40 when warm.

(My friends 5.7 LS1 maxed out the pressure gauge on his accumulator - 120psi from full throttle hits)

Thanks for the info guys. I just bought a rig and the oil pressure was a little low for what I liked. Put a melling standard volume high pressure pump on it hoping to fix the problem but I'm not sure it has. Still only about 35 at cold start and haven't got it all back together to run it around at operating temp to see how low it gets.

If it's a newer ls with the oil controlled lifters that drops certain cylinders (damn name escapes me right now, but replaced a **** ton of them lol) then there will be a screen under the oil pressures with that you can pull out with a pick and replace. Seen a lot of them cause low pressure issues. It's it's not then sounds like bearings.

Active fuel management. Just remembered the name don't feel like going and fixing my sentence from earlier lol

Alright got the new pump put on and still not fixed. Starts out at 35 cold and slowly will work its way down to 0 after about 15 minutes of running around. The only thing that has me puzzled is that it's not making a single noise when gauge says 0. I've put another gauge on it and it reads the same. Where are y'all pulling your pressure from? Mine comes from right above filter. I've heard you can also pull it from the sending unit port on back of block. I guess I'll check it from there and if it's the same I'll go internal.

Re:

Pulling mine from sending unit port up top, never seen mine below 28 and that was running too hot from sitting around idling usually idles about 35, its an '04 LQ4

Sent from my Z750C using Tapatalk

I pull mine from a port right behind the power steering pump. 5.3

Cold it idles at 45ish

Warm it idles at 25-30 and about 70 at 5 grand


My 2013 6.0 idles at 20 and cruising at 70mph/1500 rpm its about 35, does't get over 40 unless you are getting on it.

Oil pressure on the web is like diesel gas mileage. If it's running in the jeep and sounds good just run it until it blows up and quit worrying. It probably has another 100k road miles left in it.

Im guessing you have had the oil pan off and inspected?

I get mine from the remote filter housings. 6psi would make me uncomfortable. Even when I tore up the main bearings my LS2 carried 20psi at idle. Something is wrong


2010 Jim's Garage 4429
2012 Jim's Garage YJ
2013 Wide Open Design WFO