Camshaft Bearings and Camshaft Installation

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Fig 1: Camshaft Bearings and Camshaft

GM4602225

Courtesy of GENERAL MOTORS COMPANY

Camshaft Bearings and Camshaft Installation

Callout	Component Name
1	Exhaust Camshaft Procedure Coat the exhaust camshaft with lubricant. Refer to Adhesives, Fluids, Lubricants, and Sealers . Install the exhaust camshaft in the cylinder head. Ensure that the camshaft notch at the front of the camshaft is in the 12 O'clock position. Rotate the oil seals in the groove of the number one camshaft journal so the split line is at approximately the 12 O'clock position before installing the camshaft caps.
2	Camshaft Bearing Cap [5x] NOTE: Observe the markings on the bearing caps. Each bearing cap is marked in order to identify its location. Ensure the caps are installed in the original location and position. Procedure Install the cap and start the cap bolts by hand.
3	Camshaft Bearing Front Exhaust Cap Procedure Install the cap and start the cap bolts by hand.
4	Camshaft Bearing Cap Bolt [12x] CAUTION: Refer to Fastener Caution . Procedure Lubricate the bearing cap bolts. Tighten the bearing cap bolts in sequence three turns each until the caps are seated. Tighten 12 N.m (106 lb in)
5	Intake Camshaft Procedure Coat the intake camshaft with lubricant. Refer to Adhesives, Fluids, Lubricants, and Sealers . Install the intake camshaft in the cylinder head. Ensure that the camshaft notch at the front of the camshaft is in the 12 O'clock position. Rotate the oil seals in the groove of the number one camshaft journal so the split line is at approximately the 12 O'clock position before installing the camshaft caps.
6	Camshaft Bearing Cap [4x] NOTE: Observe the markings on the bearing caps. Each bearing cap is marked in order to identify its location. Ensure the caps are installed in the original location and position. Procedure Install the cap and start the cap bolts by hand.
7	Camshaft Bearing Rear Cap Procedure Install the cap and start the cap bolts by hand.
8	Camshaft Bearing Front Intake Cap Procedure Install the cap and start the cap bolts by hand.
9	Camshaft Bearing Cap Bolt [12x] Procedure Lubricate the bearing cap bolts. Tighten the bearing cap bolts in sequence three turns each until the caps are seated. Tighten 12 N.m (106 lb in)