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Discussion Starter #1 (Edited)
I recently did an oil change and noticed a few damp oil spots at the top of the of the oil pan. I want to check the bolts to see if any are loose but dont want to over tighten them. Also I dont want to run to the dealer if its nothing but a loose bolt.

So does anyone happen to know what the torque spec would be?

Thanks in advance.
 

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I would guess its the oil cooler leaking.

Otherwise it depends on what pan bolts you are refering too.
 

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Go to the dealer. It is highly unlikley that the pan bolts are loose. If they are they should know about it.
 

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Discussion Starter #4
Yea I think you guys are right, I'll be making an appointment for later in the week. Thanks.
 

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Take it to the dealer i had 2 small spots of oil on my garage floor i thought it was nothing so when i went in for a oil change they looked it over and said they Found oil leaking from rear cover of engine-Removed and replaced rear crank gasket,rear main seal and rear housing cover.Glad they took care of it so quickly . Time in the shop 6 hrs
 

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Discussion Starter #6
Thanks for the information. I will be bringing it in. I looked under there really good this time and there is a few spots that are leaking/weaping. The oil cooler has a drip hanging off of it, the fromt of the engine under the crank pully has wetness and the rear of the engine has some spots.

This is unacceptable for a car that is a little over a year old and 7000 miles on it. it should be clean and dry under there.

I will let everyone know what the outcome is going to be when i find out.
 

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Did you maybe spill a little when you were filling the engine? A little oil will spread quickly and look like a lot. Then when you are driving the wind will blow it all over and make it impossible to find the source.
 

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Discussion Starter #8
no unfortunetly thats not the case. I did the oil change roughly 2 weeks ago and noticed it but i thought it might have been a spill so i wiped it all down and when i checked yesterday there was oil again. i think i have a small leak somewhere.
 

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I forgot to mention the service advisor at GM also told me that there was a Issue with some cars and that there is a bulletin for it.It was covered under the warranty.
 

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Bullitin Search.

First question...
Oil Pan

Bolt - Block M8
25 N·m
18 lb ft

Bolt - Crankshaft Rear Oil Seal Housing M6
10 N·m
89 lb in

Windage Tray Bolt
10 N·m
89 lb in

Second comment..

This is the only bullitin that popped up..

#05-06-01-034L: 5.3L, 5.7L, 6.0L, 6.2L, 7.0L-Engine Oil Leak at Rear Cover Assembly Area (Engine Block Porosity RTV Repair Procedure) - (Jul 23, 2010)


Subject: 5.3L, 5.7L, 6.0L, 6.2L, 7.0L - Engine Oil Leak at Rear Cover Assembly Area (Engine Block Porosity RTV Repair Procedure)


Models: 2004-2007 Buick Rainier

2008-2009 Buick LaCrosse Super, Allure Super (Canada Only)

2005-2011 Cadillac CTS-V

2007-2011 Cadillac Escalade, Escalade ESV, Escalade EXT

2003-2009 Chevrolet TrailBlazer

2003-2011 Chevrolet Corvette

2004-2006 Chevrolet SSR

2005-2011 Chevrolet Silverado, Silverado SS

2006-2007 Chevrolet Monte Carlo SS

2006-2009 Chevrolet TrailBlazer SS, Impala SS

2007-2011 Chevrolet Avalanche, Suburban, Tahoe

2009-2010 Chevrolet Colorado Pickup

2010-2011Chevrolet Camaro

2003-2009 GMC Envoy

2003-2011 GMC Sierra

2004-2005 GMC Envoy XUV

2007-2011 GMC Yukon XL, Yukon Denali, Yukon XL Denali

2009-2011 GMC Canyon

2004-2006 Pontiac GTO

2005-2008 Pontiac Grand Prix GXP

2008-2009 Pontiac G8 GT

2009 Pontiac G8 GXP

2005-2009 Saab 9-7X 5.3i

2008-2009 Saab 9-7X Aero

2003-2010 HUMMER H2

2006-2010 HUMMER H3

with 5.3L, 5.7L, 6.0L, 6.2L, 7.0L VORTEC™ GEN III or GEN IV V8 Engine (All Aluminum Block) (RPOs L33, LC9, LH6, LH8, LH9, LM4, LS4, LS1, LS6, L76, L77, LFA, LZ1, LS2, L92, L94, L99, L9H, LS3, LS9, LSA, LS7)




--------------------------------------------------------------------------------

This bulletin is being revised to add the 2011 modelyear and update the Warranty Information for the Corvette. Please discard Corporate Bulletin Number 05-06-01-034K (Section 06 - Engine/Propulsion System).


--------------------------------------------------------------------------------

Condition
Some customers may comment on an engine oil leak.

Cause
Upon initial diagnosis, it may be determined that the leak is coming from the rear cover gasket. This condition may be caused by engine block porosity on the sealing surface. This issue pertains to aluminum block applications only.

Correction
Follow the steps for Oil Leak Diagnosis in SI to determine the source of the leak. If the leak has been diagnosed as coming from the engine rear cover assembly, refer to Engine Rear Cover Replacement in SI and remove the engine rear cover assembly. Inspect the engine block and engine rear cover for porosity on the mating surfaces.

• If porosity is found on the engine rear cover (see illustration below), replace the engine rear cover assembly, GM P/N 12633579.

• If porosity is found on the engine block, use the following procedure to apply RTV to repair the engine block porosity.

The porosity issue is in the gasket sealing surface at the top of the cover, near the high pressure oil crossover port. Refer to the picture below. The oil leaks by the gasket and runs down the side of the cover, and may appear to be a leak at the t-joint area of the cover. The fix is to replace the cover with GM P/N 12633579. Also, if porosity is found anywhere on the sealing surface of the engine block, use the following procedure to apply RTV to repair the engine block porosity. Refer to the illustration below.








Important: Clean any residual oil from the block and cover before applying the sealant in the next step.

Wipe a small amount of RTV, P/N 12378521 (in Canada, use P/N 88901148), onto the surface using a plastic scraper to fill the porosity.
Remove any excess RTV material, especially from inside the high pressure oil passage. Refer to #1 in the above illustration.
The joint may be closed immediately after applying the RTV. Total joint time after the RTV has been applied must be under 20 minutes.
Important: Refer to Engine Rear Cover Replacement in SI and follow the tightening specifications and sequence.

Reinstall the engine rear cover using a new gasket and a new crankshaft rear main seal. Refer to Engine Rear Cover Replacement in SI.
Parts Information
Important: For Saab (U.S.) only, use P/N 88861206 - Engine Oil Dye (U.S.) or equivalent.

Part Number
Description
Qty

12574293
Gasket - Crankshaft Rear Oil Seal Housing
1

89060436
Seal, Crankshaft Rear Main
1

12378521

(in Canada, use 88901148)
Sealant
1

88861206

(in Canada, use 88861259)
Dye, Engine Oil
1

12633579
Housing Asm - Rear Cover
1


Warranty Information (excluding Saab U.S. Models)
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

J7510*
Oil Leak -- Rear Cover Area -- Porosity Repair

Colorado/Canyon
5.5 hrs

CTS-V
5.5 hrs

Corvette

- M/T

- A/T


8.0 hrs

6.7 hrs

SSR
5.4 hrs

TrailBlazer/Envoy/Rainier/Saab 9-7X /Saab 9-7X Aero, H3

- 2WD

- 4WD


5.7 hrs

6.5 hrs

GTO

- M/T

- A/T


4.1 hrs

4.3 hrs

G8/Camaro
4.0 hrs
 

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Discussion Starter #13

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First question...
Oil Pan

Bolt - Block M8
25 N·m
18 lb ft

Bolt - Crankshaft Rear Oil Seal Housing M6
10 N·m
89 lb in

Windage Tray Bolt
10 N·m
89 lb in

Second comment..

This is the only bullitin that popped up..

#05-06-01-034L: 5.3L, 5.7L, 6.0L, 6.2L, 7.0L-Engine Oil Leak at Rear Cover Assembly Area (Engine Block Porosity RTV Repair Procedure) - (Jul 23, 2010)


Subject: 5.3L, 5.7L, 6.0L, 6.2L, 7.0L - Engine Oil Leak at Rear Cover Assembly Area (Engine Block Porosity RTV Repair Procedure)


Models: 2004-2007 Buick Rainier

2008-2009 Buick LaCrosse Super, Allure Super (Canada Only)

2005-2011 Cadillac CTS-V

2007-2011 Cadillac Escalade, Escalade ESV, Escalade EXT

2003-2009 Chevrolet TrailBlazer

2003-2011 Chevrolet Corvette

2004-2006 Chevrolet SSR

2005-2011 Chevrolet Silverado, Silverado SS

2006-2007 Chevrolet Monte Carlo SS

2006-2009 Chevrolet TrailBlazer SS, Impala SS

2007-2011 Chevrolet Avalanche, Suburban, Tahoe

2009-2010 Chevrolet Colorado Pickup

2010-2011Chevrolet Camaro

2003-2009 GMC Envoy

2003-2011 GMC Sierra

2004-2005 GMC Envoy XUV

2007-2011 GMC Yukon XL, Yukon Denali, Yukon XL Denali

2009-2011 GMC Canyon

2004-2006 Pontiac GTO

2005-2008 Pontiac Grand Prix GXP

2008-2009 Pontiac G8 GT

2009 Pontiac G8 GXP

2005-2009 Saab 9-7X 5.3i

2008-2009 Saab 9-7X Aero

2003-2010 HUMMER H2

2006-2010 HUMMER H3

with 5.3L, 5.7L, 6.0L, 6.2L, 7.0L VORTEC™ GEN III or GEN IV V8 Engine (All Aluminum Block) (RPOs L33, LC9, LH6, LH8, LH9, LM4, LS4, LS1, LS6, L76, L77, LFA, LZ1, LS2, L92, L94, L99, L9H, LS3, LS9, LSA, LS7)




--------------------------------------------------------------------------------

This bulletin is being revised to add the 2011 modelyear and update the Warranty Information for the Corvette. Please discard Corporate Bulletin Number 05-06-01-034K (Section 06 - Engine/Propulsion System).


--------------------------------------------------------------------------------

Condition
Some customers may comment on an engine oil leak.

Cause
Upon initial diagnosis, it may be determined that the leak is coming from the rear cover gasket. This condition may be caused by engine block porosity on the sealing surface. This issue pertains to aluminum block applications only.

Correction
Follow the steps for Oil Leak Diagnosis in SI to determine the source of the leak. If the leak has been diagnosed as coming from the engine rear cover assembly, refer to Engine Rear Cover Replacement in SI and remove the engine rear cover assembly. Inspect the engine block and engine rear cover for porosity on the mating surfaces.

• If porosity is found on the engine rear cover (see illustration below), replace the engine rear cover assembly, GM P/N 12633579.

• If porosity is found on the engine block, use the following procedure to apply RTV to repair the engine block porosity.

The porosity issue is in the gasket sealing surface at the top of the cover, near the high pressure oil crossover port. Refer to the picture below. The oil leaks by the gasket and runs down the side of the cover, and may appear to be a leak at the t-joint area of the cover. The fix is to replace the cover with GM P/N 12633579. Also, if porosity is found anywhere on the sealing surface of the engine block, use the following procedure to apply RTV to repair the engine block porosity. Refer to the illustration below.








Important: Clean any residual oil from the block and cover before applying the sealant in the next step.

Wipe a small amount of RTV, P/N 12378521 (in Canada, use P/N 88901148), onto the surface using a plastic scraper to fill the porosity.
Remove any excess RTV material, especially from inside the high pressure oil passage. Refer to #1 in the above illustration.
The joint may be closed immediately after applying the RTV. Total joint time after the RTV has been applied must be under 20 minutes.
Important: Refer to Engine Rear Cover Replacement in SI and follow the tightening specifications and sequence.

Reinstall the engine rear cover using a new gasket and a new crankshaft rear main seal. Refer to Engine Rear Cover Replacement in SI.
Parts Information
Important: For Saab (U.S.) only, use P/N 88861206 - Engine Oil Dye (U.S.) or equivalent.

Part Number
Description
Qty

12574293
Gasket - Crankshaft Rear Oil Seal Housing
1

89060436
Seal, Crankshaft Rear Main
1

12378521

(in Canada, use 88901148)
Sealant
1

88861206

(in Canada, use 88861259)
Dye, Engine Oil
1

12633579
Housing Asm - Rear Cover
1


Warranty Information (excluding Saab U.S. Models)
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

J7510*
Oil Leak -- Rear Cover Area -- Porosity Repair

Colorado/Canyon
5.5 hrs

CTS-V
5.5 hrs

Corvette

- M/T

- A/T


8.0 hrs

6.7 hrs

SSR
5.4 hrs

TrailBlazer/Envoy/Rainier/Saab 9-7X /Saab 9-7X Aero, H3

- 2WD

- 4WD


5.7 hrs

6.5 hrs

GTO

- M/T

- A/T


4.1 hrs

4.3 hrs

G8/Camaro
4.0 hrs[/QU
This is what they did to my car.
 

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Discussion Starter #15
So I got my car back today and what they did is put a die into the oil to see where excactly is is leaking from.

I have to drive 400-500 miles then bring it back in for a black light test to find the leak.
 
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