Express 3/4 Ton Van V8-6.5L DSL Turbo VIN F (1999)
13. Remove the valve rocker arm cover from the cylinder head.
14. Clean the oil and grease from the sealing surfaces on the valve rocker arm and the cylinder head.
Use a suitable solvent.
Installation Procedure
Notice: Do not allow the RTV sealant into the valve rocker arm cover bolt holes. This may cause a "valve lock" condition, when the bolts are
tightened, damaging the cylinder head casting.
1. Apply a 5 mm (3/16 inch) bead of RTV sealant GM P/N 12345739 to the valve rocker arm covers, inboard of the bolt holes. The sealer must be
wet to the touch when the bolts are tightened.
2. Install the valve rocker arm cover to the cylinder head.
Notice: Refer to Fastener Notice in Service Precautions.
