B5.9G, B5.9LPG – Troubleshooting and Repair Manual – 001-051   Vibration Damper, Rubber

3/8-Inch Square Drive

Remove the drive belt. Refer to Procedure 008-002.

15 mm

NOTE: Removal is easier if the crankshaft pulley/vibration damper is loosened before removing the belt.

Remove crankshaft pulley/vibration damper.

(On six-cylinder engines, a vibration damper is integral to the crankshaft pulley.)

Check the index lines (A) on the damper hub (B) and the inertia member
(C). If the lines are more than 1.59 mm [1/16 in] out of alignment, replace the damper.

Inspect the vibration damper hub (B) for cracks. Replace the damper if the hub is cracked.

Inspect the rubber member for deterioration. If pieces of rubber are missing or if the elastic member is more than 3.18 mm [1/8 in] below the metal surface, replace the damper.

NOTE: Also, look for forward movement of the damper ring on the hub. Replace the damper if any movement is detected.

15 mm

Install the crankshaft pulley. Do not tighten the capscrews to the correct torque value at this time.

3/8-Inch Square Drive

Install the drive belt. Refer to Procedure 008-002.

Service Tip: If difficulty is experienced installing the drive belt (the belt seems too short), position the belt over the grooved pulleys first and then while holding the tensioner up, slide the belt over the water pump pulley.

Tighten crankshaft pulley/vibration damper capscrews.