K 3500 Truck 4WD V8-6.6L DSL Turbo VIN 1 (2001)
camshaft bearing oil hole (Refer to illustration callout 4) as the engine is turned.
5.
If the camshaft bearing (Refer to illustration callout 2) has spun, the camshaft bearing oil hole (Refer to illustration callout 4) will either not be
visible at all or it will be misaligned with the turbocharger oil supply hole during the inspection procedure. In the event of a spun camshaft bearing,
the engine must be replaced.
Restricted Turbocharger Oil Supply Hose
If a lack of oil is suspected, the turbocharger oil supply hose should also be checked for damage. The turbocharger oil feed line is a high pressure
plastic tube that is protected by a stainless steel braided covering. If it is twisted at all or bent too far during turbocharger removal, the plastic line
may fold and kink. The kink may cause an oil flow restriction. If the plastic pipe does kink, it will not return back to its normal size and shape. The
damage may not be obvious upon inspection because the braided steel covering will hide the deformity.
LB7 Turbocharger Replacement
During turbocharger removal on the 6.6L LB7 engine, the turbocharger oil feed line can be pulled directly away from the turbocharger body in a
perpendicular fashion. Care must be taken to avoid excessive bending of the line.
LBZ, LLY or LMM Turbocharger Replacement
During repairs on the 6.6L LBZ, LLY or LMM engine, the EGR cooler does not allow enough perpendicular movement of the line to clear the
turbocharger for removal. However, the line can be pushed straight forward of the turbocharger with less risk of kinking the line. Assistance may
be required to keep the lines clear of the turbocharger during removal or installation.
Notice:
Do not twist the turbocharger oil supply line. Twisting of the line will result in the collapse and deformation of the plastic line, restricting oil
flow and causing turbocharger performance concerns.
Disclaimer
