Ignition - Information Concerning New Spark Plugs

9231OLDS05

NUMBER: 92-T-72

CORP.REF.NO: 206501

DATE: April 1992

SECTION: 6D


SUBJECT:
INFORMATION CONCERNING
NEW SPARK PLUGS


MODEL/YEARS:
1992 ACHIEVA, CUTLASS CIERA, EIGHTY EIGHT,
NINETY EIGHT, TORONADO, AND SILHOUETTE


In February of 1992, a new spark plug was released in production for vehicles with the 3300 MFI, the 3800 TPI, and the 3800 Supercharged (VIN N, L, 1) engines to improve the spark plug to spark plug boot connection. Oldsmobile vehicles using these engines are listed in the title above.

Exposure to underhood temperatures over periods of time has the tendency to increase the bond between the boat and the spark plug ceramic. In the past, different lubricants have been used in the spark plug boots with varying success. This new spark plug was released to reduce this bonding condition and to improve the dielectric strength between the plug and the boot.





This new spark plug can be visually identified by its smooth ceramic surface, (the ridges have been removed) see figure 1. These new spark plugs have an anti-stick coating baked onto the spark plug's outer ceramic surface. This coating is clear wkh a slightly waxy feel. To further help identify the new spark plug, the type number has been changed to 41-600 from R45LTS6. The 41-600 is recommended to service all 1992 models listed above.

To maintain the reduced bonding characteristics, the Service Replecement Spark Plug 41-600 must be used. The Service Package part number is 5614253. These spark plugs are currently available from GMSPO.