Oil Leak at Rear of Engine - keywords 4.8 5.3 cover crank crankshaft gasket housing LC9 leaking LH6 LMF LMG LY2main pan porous seal shaft
| Subject: | Oil Leak At Rear Of Engine |
| Models: | 2007-2008 Chevrolet Express, Silverado, Tahoe |
| 2007-2008 GMC Savana, Sierra, Yukon |
| Equipped with a 4.8 or 5.3 V-8 Engine RPO codes LC9 LH6 LMF LMG LY2 |
This PI was superceded to remove the direct engineering contact information. Please discard PIP4321A.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
A dealer may encounter a customer concern of a engine oil leak. Leak may be found at the rear of the engine.
Recommendation/Instructions:
Complete the current SI diagnostic for engine oil leaks. If a rear of engine oil leak has been verified (many times there has been multiple repair attempts with no resolution to rear of engine leak) it is possible to have a porous crankshaft. The oil leak described in this PI will originate from the rear of the crankshaft (Where a pilot bearing would be located).
If a porous crankshaft has been verified, the crankshaft will need to be replaced. Complete the current SI repair procedures and evaluate repairs.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
