Genuine 1991 Audi 100 Drive Belt

1991 Audi 100 Drive Belt Parts and Q&A

• Q: How to inspect and renew the drive belt on 1991 Audi 100?

  A: On the 1Z and AHU engines, the main V belt drives the coolant pump and power steering pump, while a ribbed belt drives the alternator and A/C compressor from the front of the crankshaft, specifically in 4-cylinder models with air conditioning. For ABP, AAT, AEL, and AAS engines, the main ribbed belt drives the power steering pump, cooling viscous fan, and alternator, with the air conditioning compressor included in models equipped with it. To access the auxiliary drivebelt, any necessary covers should be removed. The ribbed belt should be examined along its entire length for damage and wear, including cuts, abrasions, fraying, and cracking, using a mirror and possibly a torch, while the engine can be turned with a spanner on the crankshaft pulley to observe all areas of the belt. The drivebelt is automatically tensioned, and to renew it, the automatic tensioner must be released. On ABP, AAT, and AEL engines, the tensioner can be held in its released position with a special pin; using a suitable spanner, the tensioner should be moved clockwise, and a metal rod, bolt, or drill bit can be inserted to hold it in place. The drivebelt should be removed from the crankshaft, alternator, and power steering pump pulleys, as well as from under the viscous fan idler and tensioner pulleys, before fitting a new drivebelt, ensuring it is correctly engaged with all the grooves on the pulleys. If the ribbed drivebelt is to be reused, it must be marked for running direction to ensure it is fitted the same way round.