Accessory Drive Belts - Break/Coming Off Pulleys
Number 84-6 (Gasoline)-29 Date 4/84Subject: ACCESSORY DRIVE BELTS BREAKING OR COMING OFF ON 3.8L (LC3) V-6 AND 5.0L (LG4, L69) V-8 ENGINES
Models Affected: 1983 Parisienne Equipped with 3.8L (LC3) V-6 1983 - 84 Firebird, Parisienne, Bonneville, Grand Prix Equipped with 5.0L (LG4, L69) V-8
The breaking or coming off of accessory drive belts on some subject vehicles may be due to a mismatching of the water pump and crankshaft pulley diameters.. This can cause one (1) of the belts to drag in it's groove as the mismatched system tries to drive the belt at two (2) different speeds.
If the above condition is encountered, verify that the correct pulleys have been installed by referring to the illustration.