Before a rocker cover is installed on a cylinder head, it
The current die cast rocker cover (Fig. 1) is held in
is important that the silicone gasket be properly installed
place by 3/8 "-16 twelve-point head shoulder bolts with a
in its groove in the rocker cover.
steel washer and silicone isolator. The bolts have a
shoulder which bottoms out against the cylinder head.
1. Clean and blow out the groove in the rocker cover
The isolaters and gasket use low compression-set
with compressed air. Oil in the rocker cover groove or
materials which provide long sealing life and minimize
on the silicone gasket will make it difficult to install.
engine noise levels. Tighten the bolts to 15-20 lb-ft (20-
2. Press the stem side of the new T shaped gasket
down into the groove at the four corners of the cover
The current rocker cover gaskets and the current hold-
first. Then press the remainder of the gasket into place
down bolts can only be used with the current die cast
in the groove (see Fig. 1). Be sure the stem of the
rocker cover. Do not use the former gasket and hold-
entire gasket bottoms in the groove.
down knobs with the die cast cover.
Remove and Install Valve Rocker Cover
When the gasket is completely
Clean the valve rocker cover before removing it from
installed in the groove it should not
the engine to avoid dust or dirt from entering the valve
mechanism. Then loosen the bolts and lift the cover
straight up from the cylinder head. Use a new gasket
3. Before installing the rocker cover lubricate the
when reinstalling the cover.
cylinder head rail and the flat surface of the gasket with
a thin film of engine oil. This will keep the gasket from
sticking to the cylinder head rail.