LS1 oil pressure

1969mach1 · 12-15-2007, 05:50 AM

HELP!... 2001 Z28 AUTO, stock motor with 56K miles. The oil pressure is high (60+psi) when first started cold. After warming up, during driving it lowers to around 40psi and when sitting still it drops down to around 20psi. I just bought the car, is this normal?

**shady milkman** · 12-15-2007, 05:52 AM

some say yes..if shouldnt drop to 20. I would start looking into a ls6 oil pump..they are pretty cheap and are solid oil pumps..unlike the ls1 oil pump.

1969mach1 · 12-15-2007, 05:57 AM

any good after market hi-performance pumps out there? any recommendations?

**shady milkman** · 12-15-2007, 06:00 AM

ls6 oil pump is a direct bolt on. and is just as good as a aftermarket pump.

**shady milkman** · 12-15-2007, 06:00 AM

i mean i am sure you can get a dry-sump oil pump

1969mach1 · 12-15-2007, 06:03 AM

Originally Posted by shady milkman

ls6 oil pump is a direct bolt on. and is just as good as a aftermarket pump.

How big of a pain is it to do.

**shady milkman** · 12-15-2007, 06:07 AM

well if your doing a cam swap its right there...its the same process as changing the cam.

1969mach1 · 12-15-2007, 06:11 AM

thats not too bad then, Now i have a reason to tap in to the motor.

**jim brady** · 12-15-2007, 06:51 AM

I have a 02 ws6 that I bought new. Have never had problems with the motor until this morning. It has 62000 miles on it and has had the oil and filter changed every 3000 miles. Went out this morning and started it up and setting their at idle it spit a rod out of the pan. I can't beleive it! Has anyone had problems like this with the ls1.

**shady milkman** · 12-15-2007, 07:16 AM

Originally Posted by jim brady

I have a 02 ws6 that I bought new. Have never had problems with the motor until this morning. It has 62000 miles on it and has had the oil and filter changed every 3000 miles. Went out this morning and started it up and setting their at idle it spit a rod out of the pan. I can't beleive it! Has anyone had problems like this with the ls1.

what rod?

1969mach1 · 12-15-2007, 07:28 AM

no, ever heard of that on a stock 60K motor.... It wasn't knocking befor.... thats just dosen't sound right....

**jim brady** · 12-15-2007, 07:49 AM

Drove it home last evening and it was fine, no noise. went out this morning and started it, sounded fine and then just a lot of noise. shut it off got out and could see oil under car. Jacked it up and you can see a hole in the pan. Where do you go to find a motor for these cars!

1969mach1 · 12-15-2007, 08:39 AM

pull it out and have a machine shop go throught it

**shady milkman** · 12-15-2007, 08:42 AM

Originally Posted by jim brady

Drove it home last evening and it was fine, no noise. went out this morning and started it, sounded fine and then just a lot of noise. shut it off got out and could see oil under car. Jacked it up and you can see a hole in the pan. Where do you go to find a motor for these cars!

any place has motors...gmperformance...texas-speed, lg, slp, alot of shops have built motors for decent prices.

**blue02Z** · 12-15-2007, 01:04 PM

my oil pressure at idle is right around 40+psi, under WOT it goes all the way up.

nad for the broke engine, i'd pull it and rebuild that bitch and make all gobs of power

**wnmech** · 12-15-2007, 01:49 PM

Originally Posted by jim brady

I have a 02 ws6 that I bought new. Have never had problems with the motor until this morning. It has 62000 miles on it and has had the oil and filter changed every 3000 miles. Went out this morning and started it up and setting their at idle it spit a rod out of the pan. I can't beleive it! Has anyone had problems like this with the ls1.

Bought my 01 formula LS1 October a year ago with a rod thru the side of the block. I got it from the original owner had right at 100K miles on it religiously maintained and the owner swore up and down he got into the car that morning not abusing the car and bang it happened the same way as you described.

**camarojunky74** · 12-15-2007, 04:40 PM

sorry fellas,

your oil pressure seems a little low when hot, what grade oil you using and is your oil old? let us know

**edbird** · 12-16-2007, 04:22 AM

Oh My God,Sunday morning and I'm reading Horror stories worse than the nightly news!Sorry to hear about the broken rod!
As for oil pressure, oil viscosity will change pressure, as well as temp,rpm,etc. There used to be a general rule that you shold get 10psi for every 1000rpm, never to fall below 20psi.So if it's a very hot day 20 psi may not be bad.Also the increments on the gauge are not that precise either.In your case,I don't think I'd worry about it.But since you just bought it,I'd get an oil change.

1969mach1 · 12-16-2007, 06:25 AM

I got the oil changed about 500 miles ago. I got it done at the dealership I work for, I assume they used bulk 5w20. Should I get it done again with Synthetic oil? what grade is best recommended? Royal Purple? Moble1?