For 1990-2009 cars

#### Special Tools

• | EN 46101 Spark Plug Tube Seal Guide

• | EN-48383 Camshaft Retaining Tools

| For equivalent regional tools, refer to Special Tools.

1. Remove the EN 48383-3 from the rear of the right camshafts.
2. Install the EN 46101 guide onto the spark plug tubes of the right cylinder head.
3. Install the NEW camshaft cover bolt grommets prior to installing the camshaft cover bolts.
4. Wipe the camshaft cover sealing surface on the right cylinder head with a clean, lint-free cloth.
5. Place a bead 8 mm (0.3150 in) in diameter by 4 mm (0.1575 in) in height of RTV sealant, GM P/N 12378521 (Canadian P/N 88901148) or equivalent, on the engine front cover split lines (1).
6. Place the right camshaft cover into position onto the right cylinder head.
7. Loosely install the right camshaft cover bolts.

Caution: Refer to Fastener Caution in the Preface section.

8. Tighten the right camshaft cover bolts in the sequence shown.

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

8.2. | Tighten the right camshaft cover bolts a second pass in sequence to 10 N·m (89 lb in).

9. Remove the EN 46101 guide from the spark plug tubes of the right cylinder head.
10. Install the NEW spark plugs into the right cylinder head and tighten to 20 N·m (15 lb ft).
11. Install the ignition coils.
12. Install the ignition coil bolts and tighten to 10 N·m (89 lb in).