For 1990-2009 cars

#### Special Tools

EN 46328 Camshaft Holding Tool

1. Remove the EN 46328 from the right camshafts.
2. Place a small amount of sealant GM P/N 12378521 (Canadian P/N 88901148) or equivalent at the split line of the right cylinder head and the right camshaft position actuator housings.

Important: Be careful to prevent the exposed section of the camshaft cover seal from being damaged by the edge of the cylinder head casting.

3. Install the right camshaft cover.

Notice: Refer to Fastener Notice in the Preface section.

4. Install the right camshaft cover bolts.

Tighten
Tighten the right camshaft cover bolts to 10 N·m (89 lb in).

5. Install the bolts connecting the right camshaft cover ground strap to the right cylinder head and the right camshaft cover.

Tighten

• | Tighten the right ground strap bolt into the camshaft cover to 10 N·m (89 lb in).

• | Tighten the right ground strap bolt into the cylinder head to 25 N·m (18 lb ft).