Timing Belt: Adjustments

CHECKING

NOTE: Tightness of the toothed drive belt may only be checked and adjusted on a cold engine (room temperature).





1. Turn crankshaft slowly clockwise until TDC mark on camshaft sprocket lines up with mark cast in console for distributor cap.

NOTE: While turning, check toothed drive belt for wear and damage.

Crankshaft Timing Marks:

2. The TDC mark on flywheel and the cast boss on the clutch housing must also be aligned.

3. Turn engine counter-clockwise approx. 10° on crankshaft, which equals approx. 1.5 teeth toward mark on camshaft sprocket.

4. Prepare Special Tool 9201 for checking operation. Pull out lockpin on Special Tool and push test pin opposite lockpin completely out. Line up drag needle with gauge needle.





5. Slide special tool on to belt. Slowly push in gaging pin (arrow) until lockpin is felt to engage, and read value indicated on dial gage.

NOTE: To avoid incorrect readings, always line up drag needle and gaging needle only after engagement of the lockpin (turn counter-clockwise).

Adjusting Values:
New belt: 4.0 ± 0.3 scale units
Used belt: 2.7 ± 0.3 scale units
Correct toothed drive belt tightness if necessary.

NOTE: Slides must have full contact with drive belt. Do not turn or move special tool on belt during testing.

ADJUSTING

Tensioning Belt:

6. To tighten, turn tensioning roller counter-clockwise. To loosen, turn tensioning roller clockwise. Move tensioning roller accordingly with Special Tool 9244 (adjusting wrench).

7. Tighten mounting nut to torque of 45 Nm (33 ft lbs), making sure to counterhold.

8. Crank engine two turns clockwise and align TDC mark on camshaft sprocket with mark cast in console for distributor cap. Crank engine counter-clockwise from this position about 10 crankshaft degrees.

9. Recheck, and if necessary correct tightness of toothed drive belt.