OK LS6 Experts - Oil Leak Help Please

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Jul 7, 2013 | 12:36 PM

Atok

Thread Starter

Melting Slicks

Joined: Apr 2003

Posts: 2,150

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From: NS

OK LS6 Experts - Oil Leak Help Please

I have a small leak around the oil pan on my LS6. Once in awhile I see a drop on the floor of my garage. So yesterday I took a good look around. Not leaking from valve covers (block is dry). Front seal seems fine, nothing coming from bell housing cover so rear seal seems fine. I do see oil on the oil pan.

I cleaned the pan and lower engine with brake clean, went for a drive and took another look. I see oil seeping around some of the bolts but small amounts. The right back corner of the pan had significantly more oil and it was blowing back onto the exhaust pipe. Again, I cleaned it up well, ran the engine and watched. I see what appears to be bubbles but may be oil from between the rear cover and block just above the oil pan.

Is there pressurized oil behind the rear cover or does it just splash around from the pan? If I see this at idle it must really blow out at higher RPM when hot. What are my options to fix this? I'm assuming drop the drivetrain and replace the gasket on rear cover? Opinions???

VIDEO HERE

Last edited by Atok; Jul 7, 2013 at 12:39 PM.

Jul 7, 2013 | 01:58 PM

AU N EGL

Team Owner

Joined: Sep 2003

Posts: 43,084

Likes: 33

From: Raleigh / Rolesville NC

What year LS6 ?

Jul 7, 2013 | 03:31 PM

Atok

Thread Starter

Melting Slicks

Joined: Apr 2003

Posts: 2,150

Likes: 6

From: NS

2003 z06

Jul 7, 2013 | 03:51 PM

AU N EGL

Team Owner

Joined: Sep 2003

Posts: 43,084

Likes: 33

From: Raleigh / Rolesville NC

Nope normal.

Just change the oil ofter and keep it clean. The fix may be more of a hassle then it is worth.

Jul 7, 2013 | 04:51 PM

Dave concrete

Race Director

Joined: Apr 2007

Posts: 18,053

Likes: 53

From: long Island NY

I to just noticed a drop of oil anywhere I park the car. It's coming from front also. Have not put it up to see.

Jul 7, 2013 | 09:07 PM

Atok

Thread Starter

Melting Slicks

Joined: Apr 2003

Posts: 2,150

Likes: 6

From: NS

If it didn't blow back on the exhaust I wouldn't mind it as much. Once in awhile I get a sniff of the oil burning off.

Jul 8, 2013 | 02:31 PM

RedZMonte

Burning Brakes

Joined: Dec 2003

Posts: 1,243

Likes: 5

From: Loveland CO

I think mine leaks a littler there too. drips back to my exhasut pipe every now and then. nothing above that point only below. once i clean it it takes a while to make a mess.. I was honestly thinking of cleaning it up really well and use some grey gasket maker to stop it from dripping unitll its time to do a clutch.

Last edited by RedZMonte; Jul 8, 2013 at 02:34 PM.

Jul 8, 2013 | 05:59 PM

Atok

Thread Starter

Melting Slicks

Joined: Apr 2003

Posts: 2,150

Likes: 6

From: NS

Quote:

Originally Posted by RedZMonte

Yes, that looks like mine before I cleaned it. As you can see in the video I posted (watch closely on the large YouTube player), it looks like a very small leak in the gasket. It appears to "splash" out of the oil pan as there should be no pressure there. I had the same thinking as you and cleaned it up very well with brake clean then forced ultra black silicone between the block and rear cover. Hopefully that will help keep it clean until clutch change time. There are just way too many leak points in our oil pans!