oil pressure!
Thread Starter
Drifting
Joined: Feb 2008
Posts: 1,454
Likes: 1
From: Port Charlotte FL
oil pressure!
Hey guys just wondering what everyone else's oil pressure is at idle after its warmed up. My LS1 with 120k miles on it is 23 psi at idle after a few hard runs or being warmed up sitting in traffic. What goes bad on these motors first, is it the oil pump, or pickup screen getting clogged?
Not to sure about the C5's oiling system, thanks!
Not to sure about the C5's oiling system, thanks!
Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
Nothing wrong with your pressure. When the engine has 150K+ the oil pressure may start to show lower at low engine speeds. This is due to increase in bearing clearances. Keep driving it, keep up on normal maintainace and fluid changes and you should be able to double the total mileage you now have.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I replaced my 02 ZO6 pump with a Melling Pump when I did my heads/cam/FAST 90 install. Great pressures. The pump produced about 10 more PSI than stock hot and 13-15 more cold.
Replace the OEM timing chain with a LS2 chain while your there. Your inches away from a cam swap so, a mild cam will enhance your driving experiences.. Don't need to go big. Just get a good torque cam and replace your stock springs.
BC
Replace the OEM timing chain with a LS2 chain while your there. Your inches away from a cam swap so, a mild cam will enhance your driving experiences.. Don't need to go big. Just get a good torque cam and replace your stock springs.
BC
CF Senior Moments Member
Joined: Jan 2004
Posts: 1,329
Likes: 1
From: Oklahoma City Oklahoma
Hey guys just wondering what everyone else's oil pressure is at idle after its warmed up. My LS1 with 120k miles on it is 23 psi at idle after a few hard runs or being warmed up sitting in traffic. What goes bad on these motors first, is it the oil pump, or pickup screen getting clogged?
Not to sure about the C5's oiling system, thanks!
Not to sure about the C5's oiling system, thanks!
I have about 80K and recently noticed my pressure droppign down to 15 when hot idling after being run hard. Seems to go up again to 35 + to over 40 when RPMs increase. Starts out about 45 or so when cold.
I have watched engine temps and they have not gone up at all - or just slightly after running hard then sitting in traffic.
Not sure how good or how bad that is..
Melting Slicks
Joined: Sep 2006
Posts: 2,736
Likes: 7
From: Redding CA
Nothing wrong with your pressure. When the engine has 150K+ the oil pressure may start to show lower at low engine speeds. This is due to increase in bearing clearances. Keep driving it, keep up on normal maintainace and fluid changes and you should be able to double the total mileage you now have.
25-30 here @ idle warm 130K roughly
Melting Slicks
Joined: Sep 2006
Posts: 2,736
Likes: 7
From: Redding CA
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Thread Starter
Drifting
Joined: Feb 2008
Posts: 1,454
Likes: 1
From: Port Charlotte FL
I'm running mobil1 10w40, and speaking of oil...
My car has been sitting for about a month and
when I started it today I heard this "clacking" noise
almost like there was no oil in it! I know that can't be good
for the engine, has this happened to anyone else?
My car has been sitting for about a month and
when I started it today I heard this "clacking" noise
almost like there was no oil in it! I know that can't be good
for the engine, has this happened to anyone else?
Melting Slicks
Joined: Sep 2006
Posts: 2,736
Likes: 7
From: Redding CA
just make sure it's "clacking" and not "knocking"
Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
Yes, it is called piston slap and with the mileage you have it can sound bad, but doesn't really hurt anything other than to make noise. Piston slap will reduce as the engine warms.
Burning Brakes
Joined: Aug 2000
Posts: 887
Likes: 10
From: Ontario New York
Could you give details on the oil pump install? Did you use the high pressure spring that came in the pump or the low pressure spring?
Does the pump just bolt on or does the oil pan needed to be unbolted?
gary@grbowler.com
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
NO! You do NOT need to remove the pan. The oil pump is crank driven and mounted on the shout of the crank:
Heres how the oil pick up tube mounts in the pump. Its a cut away showing O ring position:
Heres how the oil pick up tube mounts in the pump. Its a cut away showing O ring position:
Burning Brakes
Joined: Aug 2000
Posts: 887
Likes: 10
From: Ontario New York
That is really good news. I have been looking for a photo that would show how the tube mounts to the pump and here it is. I see now that the front cover is bolted to the pan.
Where did you get a photo with a cut away showing the O Ring? Will the tube bend down out of the way to slide the pump onto the shaft or do you just rotate the pump up out of the way of the tube and then push the tube up into the pump.
Thanks
Where did you get a photo with a cut away showing the O Ring? Will the tube bend down out of the way to slide the pump onto the shaft or do you just rotate the pump up out of the way of the tube and then push the tube up into the pump.
Thanks
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Someone posted it a while back and I saved it. The tube is held on by ONE screw and the pump can be angled up on one end and the tube down and it will come off no issues.
Theres an improved GREEN O RING that seals much better. Try to find that O ring. I used a melling pump. It was well worth the cash. Make sure that you center the pump on the crank drive sprocket.
Check this out!!
BC
Theres an improved GREEN O RING that seals much better. Try to find that O ring. I used a melling pump. It was well worth the cash. Make sure that you center the pump on the crank drive sprocket.
Check this out!!
BC
Burning Brakes
Joined: Aug 2000
Posts: 887
Likes: 10
From: Ontario New York
http://www.brphotrods.com/mm5/mercha...gory_Code=CNV6
The September 2009 GM High Tech Performance mag. had an article that shows this "oil girdle" from BRP HOT RODS www.brphotrods.com to provide a more reliable seal for the pickup tube's O-Ring. It said it allows both bolt holes in the oil pump to be used instead of just one. Is this true that only one of the two bolt holes are being used to hold the tube to the pump? This is going to be a winter project that I want to have all of my ducks in a row before I start. You have been a big help.
The September 2009 GM High Tech Performance mag. had an article that shows this "oil girdle" from BRP HOT RODS www.brphotrods.com to provide a more reliable seal for the pickup tube's O-Ring. It said it allows both bolt holes in the oil pump to be used instead of just one. Is this true that only one of the two bolt holes are being used to hold the tube to the pump? This is going to be a winter project that I want to have all of my ducks in a row before I start. You have been a big help.
Le Mans Master
Joined: Sep 2000
Posts: 6,976
Likes: 527
From: Clouds Over California
I replaced my 02 ZO6 pump with a Melling Pump when I did my heads/cam/FAST 90 install. Great pressures. The pump produced about 10 more PSI than stock hot and 13-15 more cold.
Replace the OEM timing chain with a LS2 chain while your there. Your inches away from a cam swap so, a mild cam will enhance your driving experiences.. Don't need to go big. Just get a good torque cam and replace your stock springs.
BC
Replace the OEM timing chain with a LS2 chain while your there. Your inches away from a cam swap so, a mild cam will enhance your driving experiences.. Don't need to go big. Just get a good torque cam and replace your stock springs.
BC
My oil pressure at start up...both with 0w-40 and 5w-40 is right around 70. At 212* at idle it is 39-40 psi.
The key for you is does it climb roughly 10 psi per thousand rpms as you rev??? If so then you are fine. Lets say it idles at 23 psi hot...but when then you rev it to 5-6K rpms and it goes up to 50-60 psi. If so then everything is as should be.
Last edited by Shinobi'sZ; Sep 22, 2010 at 10:55 AM.
Burning Brakes
Joined: Aug 2000
Posts: 887
Likes: 10
From: Ontario New York
I swapped in a Melling High Volume/Pressure pump...used the red spring that came in it.
My oil pressure at start up...both with 0w-40 and 5w-40 is right around 70. At 212* at idle it is 39-40 psi.
The key for you is does it climb roughly 10 psi per thousand rpms as you rev??? If so then you are fine. Lets say it idles at 23 psi hot...but when then you rev it to 5-6K rpms and it goes up to 50-60 psi. If so then everything is as should be.
My oil pressure at start up...both with 0w-40 and 5w-40 is right around 70. At 212* at idle it is 39-40 psi.
The key for you is does it climb roughly 10 psi per thousand rpms as you rev??? If so then you are fine. Lets say it idles at 23 psi hot...but when then you rev it to 5-6K rpms and it goes up to 50-60 psi. If so then everything is as should be.
Drifting
Joined: Sep 2007
Posts: 1,649
Likes: 50
From: Goldsboro NC
sounds ok to me...as stated tho, your car should typically gain around 10psi per 1k rpms. 50+psi cold and at hot idle my car is around 40-43psi....44-46psi while crusing and 60-64psi at WOT....i have a LS6 oil pump.