1. Clean the sealing surfaces on the cylinder head and the valve rocker arm cover, so that the surfaces are free from oil and foreign material.
Notice : Do not allow the RTV sealant into the valve rocker arm cover bolt holes. This may cause a hydraulic lock condition, when the bolts are tightened, damaging the cylinder head casting.
2. Apply a 5 mm (3/16 in) bead of RTV sealant GM P/N 12346286 to the valve rocker arm covers, inboard of the bolt holes. The sealer must be wet to the touch, when the bolts are tightened.
3. Install the valve rocker arm cover.
Notice : Refer to Fastener Notice in Cautions and Notices.
4. Install the valve rocker arm cover bolts.
Tighten
Tighten the valve rocker arm cover bolts to 27 N-m (20 Ib ft).
