Camshaft Installation

Tools Required 

J 7872  Dial Indicator Set

1. Install the camshaft thrust plate to the camshaft.
   Fig 1: View Of Camshaft, Camshaft Gear & Camshaft Thrust Plate

   Courtesy of GENERAL MOTORS CORP.
2. Install the camshaft driven gear.
3. Install a new camshaft driven gear bolt.

   Leave the bolt finger tight.

4. Install the camshaft and gear assembly into the cylinder block, aligning the camshaft gear to the crankshaft gear as shown.
   Fig 2: Aligning Camshaft And Crankshaft Gears

   Courtesy of GENERAL MOTORS CORP.
NOTE: Refer to FASTENER NOTICE .
5. Install the camshaft thrust plate bolts.

   Tighten:  Tighten the camshaft thrust plate bolts to 22 N.m (16 lb ft).

IMPORTANT: Use a suitable tool to relieve the spring tension while removing the locking bolt.
Fig 3: Using Exciter Ring Bolt To Secure Spring Tension
Courtesy of GENERAL MOTORS CORP.
6. Remove the exciter ring bolt that was installed to hold the spring tension of the two piece cam gear.
7. Install the camshaft position sensor exciter ring to the camshaft gear.
   Fig 4: View Of Camshaft Exciter Ring, Bolts & Thrust Plate Bolts

   Courtesy of GENERAL MOTORS CORP.
8. Install the camshaft position sensor exciter ring bolts.

   Tighten:  Tighten the camshaft position sensor exciter ring bolts to 9 N.m (80 lb in).

9. Block the crankshaft from turning using a wooden handle.
   Fig 5: Blocking Crankshaft From Turning Using Wooden Handle

   Courtesy of GENERAL MOTORS CORP.
10. Install the new camshaft gear bolt.

    Tighten:  Tighten the new camshaft gear bolt to 234 N.m (173 lb ft).

11. Measure the camshaft end play with J 7872  .
    Fig 6: Measuring Camshaft End Play Using J 7872

    Courtesy of GENERAL MOTORS CORP.
    • The production value is 0.050-0.114 mm (0.0020-0.0045 in) and service limit is 0.2 mm (0.0079 in).
    • Replace the camshaft gear or the camshaft thrust plate if measured value exceeds the service limit.