Adm Msg - New Intake Gasket for 3.1L LG8 and 3.4L LA1 Engines
| Subject: | Adm Msg -- New Intake Gasket for 3.1L LG8 and 3.4L LA1 Engines |
| Models: | 1999-2003 Buick Century, Rendezvous; Chevrolet Impala, Monte Carlo, Venture; Oldsmobile Alero, Silhouette; Pontiac Aztek, Grand Am, Grand Prix and Montana |
| Attention: | Service Manager, Parts Manager, Warranty Administrator |
A new design intake gasket, P/N 89017279, has been released for service on the 3.1 and 3.4 engines and is currently available from GMSPO. The material used in the gasket has been changed in order to improve the sealing qualities of the gasket. The instruction sheet sent with the gaskets advises the technicians to replace the intake bolts with new ones that have a thread locker adhesive added. Currently the new bolts are unavailable from SPO. In the interim, the technicians are to clean the existing bolts and then apply a thread locking adhesive, P/N 12345382, and tighten to a new torque specification.
The new torque specification is a 2-step process; tighten the vertical lower intake manifold bolts (the four middle ones) to 7 N·m (62 lb in). Tighten the diagonal lower intake manifold bolts (two on each end) to 7 N·m (62 lb in). Tighten the vertical lower intake manifold bolts (the four middle ones) to 13 N·m (115 lb in). Tighten the diagonal lower intake manifold bolts (two on each end) to 25 N·m (18 lb ft).
The new torque specifications will be reflected in Thursday's down load of SI.
