90 Quattro 20V L5-2309cc 2.3L DOHC (7A) (1990)
14 - Idler pulley 10 Nm (7 ft lb)
15 - 20 Nm (15 ft Ib)
16 - Water pump (turn to left to tension drive belt)
17 - O-ring (after removing the water pump on older engines it is recommended that the sealing surfaces be cleaned and the 0-ring replaced)