| Subject: | Identification Of Camshaft Sprocket Design For Service |
| Models: | 2000 Buick Century |
| 2000 Chevrolet Impala, Malibu, Monte Carlo, Venture |
| 2000 Oldsmobile Alero, Silhouette |
| 2000 Pontiac Grand Am, Montana |
| With 3.1 L or 3.4 L Engine (VINs J, E -- RPOs LG8,
LA1) |
Some dealers may have parts identification concerns regarding
the 2000 3.1 L and 3.4 L engines (RPOs LG8, LA1) camshaft and
crankshaft timing components. Dealers may have encountered that parts ordered
do not fit, or have a different appearance than those the vehicle was originally
equipped with.
The cause is revised drive sprockets, chain and dampener introduced
into vehicle production, replacing previous design components. This occurred
during the model year.
Important: Previous and revised design components may not be intermixed with each
other. Attempting to use a mix of the two types of timing components will
result in the inability to assemble and time the vehicle.
Reference the following figures and associated part numbers to clarify
which replacement parts should be ordered, depending upon which design the
vehicle was equipped with. If it is necessary to replace all components during
service, it is recommended to use the revised design components.
Parts are currently available from GMSPO.
PREVIOUS DESIGN SPROCKET IDENTIFICATION AND PART NUMBERS
| • | P/N 10166350 -- Camshaft
Sprocket (40 Teeth) |
| • | P/N 14074400 -- Crankshaft Sprocket (20 Teeth) |
| • | P/N 10166352 -- Drive Chain |
| • | P/N 10166353 -- Chain Dampener |
REVISED SPROCKET IDENTIFICATION AND PART NUMBERS
| • | P/N 24506089 -- Camshaft
Sprocket (50 Teeth) |
| • | P/N 24506088 -- Crankshaft Sprocket (25 Teeth) |
| • | P/N 24506090 -- Drive Chain |
| • | P/N 24507720 -- Chain Dampener |
