Camshaft Sprockets - Installation

CAMSHAFT SPROCKETS






CAUTION: The camshaft sprockets are keyed and not interchangeable from side to side because of the camshaft position sensor pick-up.

CAUTION: The camshafts must be pushed back into the cylinder head after the camshaft sprockets and retaining bolts are positioned. Care must be taken not to scratch or nick the camshaft or cylinder head journals when moving the camshafts.

1. Install the camshaft sprockets onto the camshafts. Install NEW sprocket attaching bolts into place. The 255 mm (10 in.) bolt is installed in the left camshaft and the 213 mm (8 3/8 in.) bolt is installed into the right camshaft. Do not tighten the bolts at this time, they will be tightened at a later step. Camshaft sprocket timing marks should be aligned with inner cover timing marks at both sprockets.
2. Install the camshaft thrust plates (1) and seals. Tighten the bolts (2) to 28 Nm (250 in. lbs.).










3. Install the timing belt starting first at the crankshaft sprocket, then to remaining sprockets in a counterclockwise direction.
4. Install the belt around the last sprocket. Maintain tension on the belt as it is positioned around the tensioner pulley. Camshaft sprocket timing marks (1) and crankshaft sprocket timing mark (3) should still be aligned with the inner cover marks.

NOTE: It is necessary to compress the plunger into the tensioner body and install a locking pin prior to reinstalling the tensioner. See Timing Belt Removal for tensioner compression procedure Timing Belt & Sprockets - Removal .

5. Hold the tensioner pulley against the belt and install the reset (pinned) timing belt tensioner (2) into the housing. Tighten attaching bolts to 28 Nm (250 in. lbs.).
6. Remove tensioner retaining pin to allow the tensioner to extend to the pulley bracket.





7. Hold the right camshaft sprocket hex with a 36 mm (1 7/16 in.) wrench and tighten the right camshaft bolt to 102 Nm (75 ft. lbs.) +90° turn.





8. Hold the left camshaft sprocket hex with a 36 mm (1 7/16 in.) wrench and tighten the left camshaft bolts to 102 Nm (75 ft. lbs.) +90° turn.
9. Install the rocker arm assemblies and cylinder head covers Valve Rocker Arm - Installation
10. Install the front timing belt cover Engine Timing Cover(s) - Installation

NOTE: The Cam/Crank Variation Relearn procedure must be performed anytime there has been a repair/replacement made to a powertrain system, for example: flywheel, valvetrain, camshaft and/or crankshaft sensors or components Programming and Relearning