Camshaft Gear/Sprocket: Service and Repair

Camshaft Drive Sprocket Replacement

Tools Required
^ J36660-A Torque/Angle Meter
^ J42069 Timing Belt Alignment Kit
^ J42098 Crank Hub TORX� Socket

Removal Procedure
1. Remove the timing belt.





2. As a precaution, rotate the crankshaft counter clockwise using the J42098 until 60 degrees Before Top Dead Center (BTDC). The 60 degrees BTDC point can be identified by the index mark on the oil pump cover, at this position the valves will not touch the pistons.





3. Remove the camshaft drive sprocket bolt. The J42069-1 and J42069-2 will hold the drive sprockets in place while removing the bolts. Discard the camshaft drive sprocket bolt.
4. Remove the J42069-1 and J42069-2.
5. Remove the camshaft drive sprocket.

Installation Procedure





1. Ensure the crankshaft is 60 degrees BTDC. The 60 degrees BTDC point can be identified by the index mark on the oil pump cover, at this position the valves will not touch the pistons.






Important: The camshaft drive sprockets have numbered slots that must be aligned with the pins on the camshafts.

When the numbered camshaft drive sprocket slot is properly installed on the camshaft pin, the reference mark (1, 2, 3 or 4) on the drive sprocket, will align with the notch on the rear timing belt cover.

2. Install the camshaft drive sprocket. Ensure the camshaft pin is installed in the correct numbered slot on the drive sprocket.






Notice: Refer to Torque to Yield Bolts Notice in Service Precautions.

3. Install the new camshaft drive sprocket bolt.





4. If necessary, turn the camshaft drive sprockets in order to align the reference marks on the camshaft gears with the corresponding notches on the rear timing belt cover.





5. Complete the following in order to tighten the new camshaft drive sprocket bolt:
1. Use the relevant J42069-1 and/or J42069-2 to hold the camshaft drive sprocket and the camshaft in place while tightening the camshaft drive sprocket bolt.
2. Tighten the camshaft drive sprocket bolt in sequence:

Tighten
1. Tighten the camshaft drive sprocket bolt to 50 Nm (37 ft. lbs.).
2. Using the J36660-A, rotate the crankshaft gear bolt 60 degrees.
3. Repeat the sequence turning the crankshaft gear bolt an additional 15 degrees.





6. Turn the crankshaft back to Top Dead Center (TDC), using the J42098.
7. Install the timing belt.