Installation Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Camshaft, Camshaft Gear & Camshaft Thrust Plate

Courtesy of GENERAL MOTORS CORP.

Install the camshaft thrust plate to the camshaft.
Install the camshaft driven gear.
Install a new camshaft driven gear bolt.
Leave the bolt finger tight.

Fig 2: Exploded View Of Camshaft Gear Aligned With Crankshaft Gear

Courtesy of GENERAL MOTORS CORP.

Install the camshaft and gear assembly into the cylinder block, aligning the camshaft gear to the crankshaft gear as shown.

CAUTION: Refer to Fastener Caution .

Install the camshaft thrust plate bolts and tighten to 22 N.m (16 lb ft).

Fig 3: Identifying Locking Bolt

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NOTE: Use a suitable tool to relieve the spring tension while removing the locking bolt.

Remove the exciter ring bolt that was installed to hold the spring tension of the two piece cam gear.

Fig 4: View Of Camshaft Exciter Ring, Bolts & Thrust Plate Bolts

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Install the camshaft position sensor exciter ring to the camshaft gear.
Install the camshaft position sensor exciter ring bolts and tighten to 9 N.m (80 lb in).

Fig 5: View Of Wooden Handle Blocking Crankshaft

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Block the crankshaft from turning using a wooden handle.
Install the new camshaft gear bolt and tighten to 234 N.m (173 lb ft).

Fig 6: Measuring Camshaft End Play Using J 7872

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Measure the camshaft end play with J 7872: Dial Indicator Set.
- 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.