Intake Camshaft, Housing & Lifter - Installation

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.
   Fig 1: Camshaft Carrier Dowel Pins

   Courtesy of GENERAL MOTORS CORP.
2. Install the camshaft housing to the cylinder head with a new gasket. Sealer is unnecessary.
Fig 2: Installing Camshaft Housing To Cylinder Head
Courtesy of GENERAL MOTORS CORP.
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.
   NOTE: 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.
   Fig 3: Camshaft Housing Cover

   Courtesy of GENERAL MOTORS CORP.

   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 the camshaft housing to cylinder head bolts to 22 N.m (16 ft lbs) + 90 degrees.
    • Tighten the camshaft housing cover to camshaft housing bolts to 22 N.m (16 ft lbs) + 30 degrees.
    Fig 4: Camshaft Housing Bolt Tightening Sequence

    Courtesy of GENERAL MOTORS CORP.

    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.
    Fig 5: Power Steering Pump Assembly

    Courtesy of GENERAL MOTORS CORP.