Exhaust Camshaft and Lifter Installation

Important:  Used lifters must be returned to their original position in the cylinder head. If the camshaft is being replaced, the lifters must also be replaced.

1. Oil the lifters and install the lifters into the lifter bores.
2. Install the intake camshaft onto the cylinder head with the number 1 cam lobes facing as shown.

   Important:  Each bearing cap has a number and a directional arrow marked on the bearing cap.

   Fig 1: Installing Intake Camshaft Onto Cylinder Head

   Courtesy of GENERAL MOTORS CORP.
3. Install the camshaft bearing caps in their proper locations with the arrows facing forward.
   NOTE: Refer to FASTENER NOTICE .
4. Install the camshaft bearing cap bolts.

   Tighten 

   • Tighten the camshaft bearing cap bolts in the sequence shown to 13 N.m (10 lb ft).
   • Tighten the front bearing cap bolts to 23 N.m (17 lb ft).
     Fig 2: Identifying Camshaft Bearing Cap Bolts Tightening Sequence

     Courtesy of GENERAL MOTORS CORP.
5. Install the exhaust camshaft sprocket to the camshaft.
6. Install the exhaust camshaft sprocket bolt to the camshaft.

   Tighten 

   Tighten the cam sprocket bolt to 55 N.m (40 lb ft).

   Fig 3: Installing Exhaust Camshaft Sprocket To Camshaft

   Courtesy of GENERAL MOTORS CORP.