Timing Belt: Adjustments

CHECKING AND ADJUSTING TOOTHED BELT (32 VALVE ENGINE)

Checking

1. Remove air guide hoses.





2. Unscrew two self-tapping screws and take off upper air guide section from above.





3. Unscrew and take off distributor caps and toothed belt cover upper section on righthand side.





4. Unscrew and push toothed belt cover upper section on lefthand side forward.





5. Turn engine in direction of rotation to TDC (cyl. 1). Marks on camshaft and flange bearings must be aligned in this position.

RH Camshaft:

LH Camshaft:

6. Turn engine two more turns until TDC mark is reached again and then continue turning while checking toothed belt for wear and damage.





7. Prepare Special Tool 9201 for checking. Pull out lock pin on special tool and move testing pin opposite the lock pin to starting position. Place drag needle on gauge needle.

8. Slide special tool on released belt section of toothed belt (sliding shoe on smooth surface, roller must fit in tooth gap).





9. Press down tester on housing (arrow 1) slowly until gauge tip resting on air pump bracket (arrow 2) engages.

Read test value without tension in tester, i.e. tester must be kept horizontal to the toothed belt. Tester must not rest on the plastic cover.

Sliding shoes must rest on belt with their entire surface. Special tool must not be turned or moved on the belt during the entire checking procedures.

Note: The drag needle must always be placed on the gauge needle after the lock pin has engaged to exclude erroneous gauge readings (turn anticlockwise).

10. Pull out lock pin to have gauge tip disengage.

Important: Engine must be turned to position described in point 5 for this test. Repeat test one or two for checking! Adjusting value: 5.0 + 0.3. Correct belt tightness if necessary.

Adjusting





The toothed belt adjusting screw is located on bottom of engine at front righthand side.

Loosen lock nut of adjusting screw and turn adjusting screw until correct toothed belt tightness is reached. Tighten lock nut. Turn engine two more turns and recheck belt tightness.

Screw tightened - belt tightened.
Screw loosened - belt loosened

Note: Never turn engine anticlockwise, because toothed belt could jump off if tightness were insufficient.