For 1990-2009 cars

#### Tools Required

J 36660-A Torque/Angle Meter

Important: Ensure that the camshaft housing alignment dowel pins are in the cylinder head prior to installing the housing.

1. Install the camshaft carrier dowel pins in the cylinder head.
2. Install the camshaft housing to the cylinder head with a new gasket.

Sealer is unnecessary.

3. Loosely install one camshaft housing to the cylinder head bolt in order to hold the housing in place.

Important:

• | Used lifters must be returned to the original position in the camshaft housing.

• | If the camshaft is being replaced, the lifters actuated by the camshaft must also be replaced.

4. Install the lifters into the lifter bores.

Notice: The camshaft lobes and the journals must be adequately lubricated or serious engine damage will occur upon start up.

5. Lube the camshaft lobe and journals with the camshaft and lifter prelube GM P/N United States 12345501, GM P/N Canada 992704 or the equivalent.
6. Install the camshaft in the same position as when removed.

The timing chain sprocket dowel pin should be straight up and line up with the centerline of the lifter bores.

7. Install the new camshaft housing to the green colored camshaft housing cover seals and into the cover.

Sealant is unnecessary.

8. Remove the loose bolt holding the housing in place.
9. Install the camshaft housing cover to the camshaft housing.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Important: The top intake camshaft housing bolts are tightened to a different specification than the other camshaft housing bolts.

10. Using the J 36660-A , install and tighten the bolts in sequence.

Rotate the bolts the amount of degrees specified in sequence.

Tighten

• | Tighten the camshaft housing to cylinder head bolts to 22 N·m (16 lb ft) + 90 degrees.

• | Tighten the camshaft housing cover to camshaft housing bolts to 22 N·m (16 lb ft) + 30 degrees.

Important: When reinstalling the power steering pump, apply a 3 mm bead of GM P/N United States 12346286, GM P/N Canada 10953472 sealer or the equivalent to the joint at the end of the camshaft housing halves before the installation of the power steering pump and the pump face seal.

11. Install the power steering pump assembly.