Timing Chain Tensioner Replacement - Camshaft

Removal Procedure

Caution: Refer to Battery Disconnect Caution in Service Precautions.

1. Disconnect the negative battery cable.
2. Remove the timing chain housing. Refer to Timing Chain Housing Replacement.
3. Remove the spark plugs in order to make rotating the crankshaft to line up the timing marks easier.

Important:
^ The timing marks must be correctly aligned before disassembly.
^ Do not turn the camshafts and the crankshaft once the timing chain tensioner is removed. Valve and piston damage may occur.





4. Rotate the crankshaft so that the following conditions are met:
^ The number 1 (front most) cylinder is at the Top Dead Center (TDC) position on the compression stroke.
^ The keyway on the crankshaft (5) aligns with the mark on the engine block (4).
^ The arrow (3) on the idler sprocket is pointing upward.
^ The guide pins (1) on the camshaft sprockets line up with the notches (6) on the cylinder head.

5. Relieve the tension on the camshaft timing chain by turning the intake camshaft slightly counterclockwise.





6. Remove the nut and 2 bolts (1,2).
7. Remove the camshaft timing chain tensioner and the gasket.

Installation Procedure
1. Inspect the camshaft timing chain tensioner for wear, damage and correct operation. Replace as necessary.
2. Inspect the timing chain tensioner gasket and replace as necessary.





3. Compress the camshaft tensioner plunger into the body. Insert a retainer (a paper clip or similar tool) through the hole in the body in order to hold the plunger in place.

Notice: Refer to Fastener Notice in Service Precautions.





4. Install the gasket and the camshaft timing chain tensioner.
^ Tighten the bolts (1) to 11 Nm (97 inch lbs.).
^ Tighten the nut (2) to 45 Nm (33 ft. lbs.).

5. Remove the retainer from the tensioner.





6. Turn the crankshaft 2 revolutions realigning the keyway on the crankshaft (5) with the timing mark on the engine block (4).
7. Ensure that the guide pins on the camshafts (1) are in line with the notches on the cylinder head (6).
8. Apply engine oil to the following:
^ The timing chains
^ The tensioner
^ The guides
^ The sprockets

9. Install the spark plugs.
^ Tighten the spark plugs to 25 Nm (18 ft. lbs.).
10. Install the timing chain housing. Refer to Timing Chain Housing Replacement.
11. Connect the negative battery cable.