Ignition - Spark Plug Replacement Caution
Bulletin 85-6D-1Date Mar.. '85
Ref. No. 85-101-6D
SUBJECT: SPARK PLUG INFORMATION
MODELS AFFECTED: 1985 SKYHAWKS WITH 1.8L O.H.C. ENGINE (VIN CODE O)
Some published information from sources other than Buick indicate that the copper tip spark plug #R44CXLS is a direct replacement for the standard #R44XLS.
In some engines this may be true. However, testing in the 1.8L O.H.C. engine (VIN Code 0) , indicated some degree of performance may be lost as a result of using the #R44CXLS plug.
Buick is therefore, not recommending the use of the #R44CXLS in vehicles equipped with these engines.
NOTE: The #R42CXLS plugs used in 1.8L O.H.C. engines, (VIN Code J) are not affected.