Savana 3500 V8-4.8L (2009)
Oil Cooler: Customer Interest
Engine - Oil Leak At Oil Cooler Hose/Pipe Assembly
TECHNICAL
Bulletin No.: 08-06-02-003A
Date: October 27, 2010
Subject: Engine Oil Leak at Engine Oil Cooler Hose/Pipe Adapter to Engine Connection (Diagnose and Repair as Outlined)
Models:
2007-2011 Chevrolet Silverado, Suburban, Tahoe
2008-2011 Chevrolet Express
2007-2011 GMC Sierra, Yukon, Yukon XL
2008-2011 GMC Savana
Equipped with 4.8L, 5.3L, 6.0L or 6.2L V8 Engine (VIN Code C, M, L, J, 4, 0, 3, 5, K, Y, 8 or 2 - RPO LY2, LH6, LY5, LMF, LMG, LC9, LFA, LY6,
L76, L92 or L9H) and Engine Oil Cooling System RPO KC4
Supercede:
This bulletin is being revised to clarify the Subject text, add model years, Cause, Correction, graphics and part number information. Please discard
Corporate Bulletin Number 08-06-02-003 (Section 06 - Engine/Propulsion System).
Condition
Some customers may comment on an engine oil leak. Upon further investigation, the technician may find engine oil leaking from the engine oil cooler
hose/pipe adapter at the point where it connects to the engine.
Cause
This condition may be caused by any of the following:
-
A damaged engine oil cooler hose/pipe adapter gasket, due to a temporary steel sealing device not being removed when the engine oil cooler
hose/pipe adapter was first connected to the engine.
-
Previous oil leak servicing of the engine oil cooler hose/pipe adapter gasket that involved failing to remove the temporary steel sealing device.
-
Casting porosity at the engine oil cooler hose/pipe adapter bolt holes of the engine.
-
The engine oil cooler hose/pipe adapter bolts are not torqued to the proper specification.
Correction
1. Perform the oil leak diagnosis procedure. Refer to Oil Leak Diagnosis in SI.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
3. The temporary steel sealing device (1) is shown separately from the adapter gasket (2). The temporary steel sealing device SHOULD NOT be
installed on the engine or the engine oil cooler hose/pipe adapter.
Note
