4.2L VIN S LL8 - Oil Pan Drain Plug Opening Thread Information - kw damage engine leak

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in the PI.

A heli-coil may be removed from the oil pan drain plug opening when the oil pan drain plug is removed during an oil change.

This heli-coil is part of the oil pan assembly. The harder material of the heli-coil allows repetitive removal and installation of the oil pan drain plug. If this heli-coil comes out of position, it will be necessary to install a time sert by following the thread repair procedure outlined in SI document 764602. All of the installation tools and specifications can be found in the "Oil-Pan Top View" table that is listed in SI document 730859. The correct time sert number is 416, which is available through Kent Moore by ordering kit number J 42385-416.

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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.

(04 05 Buick Rainier with the 4.2L VIN S Engine) and (02 03 04 05 Chevrolet TrailBlazer with the 4.2L VIN S Engine) and (02 03 04 05 GMC Envoy with the 4.2L VIN S Engine) and (02 03 04 Oldsmobile Bravada with the 4.2L VIN S Engine)

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