Low oil pressure?
Low oil pressure? Alright hopefully someone can shed some light on this for me.
I just swapped a ls1 out of a '03 c5 into my '98 trans am, only thing I swapped over from my old engine was the oil pan, and accessories.
Has a trickflow 228/232 112lsa cam, double roller timing, high volume pump, etc...
I just finished installing the engine last week, and upon start up she is only running 20 psi cold idle, where as my previous engine ran 45 psi cold.
Is this normal for a high volume, or the result of a bad pump or pinched pickup o-ring?
Thanks for any help in advance...
Gary.
I just swapped a ls1 out of a '03 c5 into my '98 trans am, only thing I swapped over from my old engine was the oil pan, and accessories.
Has a trickflow 228/232 112lsa cam, double roller timing, high volume pump, etc...
I just finished installing the engine last week, and upon start up she is only running 20 psi cold idle, where as my previous engine ran 45 psi cold.
Is this normal for a high volume, or the result of a bad pump or pinched pickup o-ring?
Thanks for any help in advance...
Gary.
I am using the stock guage currently, but the next step is hooking up a mechanical guage. The oil sending unit seem to be functioning fine, as the pressure increases with the rpms like normaL, and i tried 2 brand new sending units.
If that mechanical gauge checks out and your pressure is indeed low, Id look at the pump. I read somewhere that the oil pump pickup had something to do with this... Id start there. Also, there is a spring inside that you can change out to increase pressure.. either way, youll need to open it up...Id start by checking the pickup, screen and spring
TECH Fanatic
Joined: Jul 2011
Posts: 1,074
Likes: 2
Check the oil pump pickup tube o-ring gasket. When it isn’t sealed all the way it will draw in air and read low oil pressure along with aerating the oil. There is a TSB for it and I would definitely check and replace the o-ring for the pick up tube. Gm has special procedures on how to do it properly, there is a special procedure.
Trending Topics
I would not drive it. I just put a new motor in my car and after 250 miles my oil pressure went down to 20psi at idle and after cutting open the oil filter I have to pull the motor back out because you can tell at least one bearing is toast.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Well after dropping the pan, everything seemed to look alright.
O-ring wasn't pinched, pickup to pan clearance is just under 1/2".
I'm swapping the oil pump next week, is there anything else I could possibly be missing?
O-ring wasn't pinched, pickup to pan clearance is just under 1/2".
I'm swapping the oil pump next week, is there anything else I could possibly be missing?
