3.6L LY7 Engine - Engine Oil Leak - kw adapter filter gasket mechanical oil

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

An engine oil filter adapter leak.

The following information is aimed to describe the most possible causes and approved service procedures for a left front of engine oil leak from the oil filter adapter to engine block. The possible causes below are listed in order of highest probability to lowest.

IMPORTANT: Perform diagnoses or repairs in this order.

1. Add oil dye. Add GM oil dye #12345795 or equivalent, run engine and inspect the area with a black light to determine the leak source.
2. If the large M20 plug in the engine block above the oil filter adapter is wet around the circumference of the head or if there is a stain running down from it toward the filter adapter, remove the plug, clean with degreaser, clean hole in block, apply liquid PTFE thread sealer Loc-Tite 567 or GM equivalent to the external threads (leaving the first thread free of sealant) and reinstall the plug to 50 Nm. Be careful not to get excess sealant in the gallery hole.
3. If the plug is dry and the Oil Filter Adapter gasket is wet around the edges, remove the oil filter adapter, clean the adapter and block faces with a plastic scraper (be careful to not scratch the sealing surfaces), and replace with new gasket .,Re-torque oil filter adapter bolts to 25Nm in a criss-cross pattern and torque them again to the same spec.

IMPORTANT: Under no circumstances is RTV or any other liquid sealer to be applied to the gasket, it will only work if installed clean and dry.

4. If there is oil dye or staining on the filter adapter casting far away from the gasket interface, replace the oil filter adapter assembly, as porosity may be the cause. Oil Filter adapter assembly replacement should be the last resort.

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Please follow this diagnosis 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. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.

(04 Cadillac CTS) and (04 Cadillac SRX)

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