Special Tools

1. Remove the EN 46105-1 from the rear of the right camshafts.



2. Install the EN 46101 onto the spark plug tubes of the right cylinder head.



3. Install the 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.

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




9. Remove the EN 46101 from the spark plug tubes of the right cylinder head.



10. Install the NEW spark plugs into the right cylinder head.

Tighten
Tighten the spark plugs to 20 N·m (15 lb ft).




11. Install the ignition coils.



12. Install the ignition coil bolts.

Tighten
Tighten the ignition coil bolt to 10 N·m (89 lb in).