Timing Belt Tensioner: Adjustments

Timing Belt Tensioner Adjustment

Important: The following steps are the COMPLETION of adjusting the timing belt and must not be performed as a stand alone operation.







1. With the J 42069-10 in place locking the crankshaft at TDC:
1.1. Loosen the timing belt eccentric locking nut.
1.2. Turn the eccentric counter clockwise to full stop, then back to the following specification:

NEW BELT
until the reference mark is 3 - 4 mm (0.118 - 0.157 inch) (a) above the datum line.

USED BELT
until the reference mark is aligned with the datum line.

Tighten the timing belt tensioner eccentric locking nut to 20 Nm (15 ft lbs.).







2. If the timing belt upper idler pulley bolt has not been previously torqued to specification:
Tighten the timing belt upper idler pulley bolt while holding the eccentric in place with the J 42069-40 to prevent movement, to 40 Nm (30 ft. lbs.).

3. Remove the J 42069-10 and the J 42069-20.







4. For final inspection, once again rotate the crankshaft in the engine rotational direction, clockwise 2 revolutions using the J 42098 until reaching 60 degrees BTDC.







5. Install the J 42069-10 to the crankshaft sprocket.
6. Rotate the crankshaft in the engine rotational direction, clockwise using the J 42098 until the lever of the J 42069-10 firmly contacts the water pump pulley flange.
7. Secure the moveable lever of the tool to the water pump pulley flange.

Important: The alignment marks on the timing belt will no longer align with the marks on the camshaft gears after one or more engine revolutions.







8. Inspect the alignment of the reference marks on the camshaft gears with the notches on the rear timing belt cover, as well as the mark on the crankshaft sprocket and oil pump housing.







9. Use the J 42069-20 to inspect the alignment of the camshaft gears 3 and 4.
10. Use the J 42069-20 to inspect the alignment of the camshaft gears 1 and 2.
11. Repeat the procedure again if the marks do not align exactly.
12. If the reference marks match exactly, further timing belt adjustment IS NOT necessary.
Continue with reassembly of the engine.

13. Remove the J 42069-10 and the J 42069-20.
14. Install the crankshaft balancer.
15. Install the timing belt cover.