For 1990-2009 cars

# SPARK PLUG AND GAP CLARIFICATION & SPECIFICATIONS

1981 thru 1985

The following information is being supplied to clarify any confusion about recommended spark plugs and their appropriate gaps for all Pontiac vehicles.

YEAR ENGINE VIN CODE SERIES SPARK PLUG GAP ---- ------ ------ ------ ---------- --- 1981 1.6L 9 T R42TS .035" 2.5L 5 X R44TSX .060" 2.8L X X R43TS .045" 3.8L A A,B,F R45TS8 .080" 4.3L S A,B,F R45TSX .060" 4.9L W A,F R45TSX .060" 4.9L Turbo T F R45TSX .060" 5.0L Y B R46SX .080" 5.0L H F R45TS .045"

1982 1.6L C T R42TS .035" 1.8L 2bbl G J *R42CTS .035" 1.8L EFI O J *R44XLS .035" 2.5L EFI R,2 A,F,X R44TSX .060" 2.8L X,1,Z A,F,X *R43CTS .045" 2.8L Z A,F,X R42CTS .045" 3.8L A G R45TS8 .080" 4.1L 4 G R45TS8 .080" 5.0L 4bbl H F R45TS .045" 5.0L CFI 7 F R45TS .045"

1983 1.6L C T *R42CTS .035" 1.8L EFI O J *R44XLS .035" 2.0L EFI P J R42CTS .035" 2.5L EFI R,2 A,F,X *R44TSX .060" 2.8L L,X,1 A,F,X R43CTS .045" 2.8L H.O. Z X R42CTS .045" 3.8L A G R45TS8 .080" 3.8L 9 B R45TS .045" 5.0L 4bbl H G,F,B R45TS .045" 5.0L CFI S F R45TS .045" 5.0L H.O. 7 F R42CTS .045"

1984 1.6L C T R42CTS .035" 1.8L EFI O J R44XLS .035" 1.8L Turbo J J R42CXLS .035" 2.0L EFI P J R42CTS .035" 2.5L EFI R,2 A,F,P,X *R43TSX .060" 2.8L H.O. Z,L A,F,X R42CTS .045" 2.8L X,1 A,F,X R43CTS .045" 3.8L A B,G R45TSX .060" 5.0L H B,F,G R45TS .045" 5.0L H.O. G F R44TS .045"

1985 1.6L C T R42CTS .035" 1.8L EFI O J R44XLS .035" 1.8L Turbo J J R42CXLS .035" 2.5L EFI R,2,U A,F,P,N R43TSX .060" 2.8L 2bbl X A R43CTS .045" 2.8L MFI 9,W,S A,F,P R42CTS .045" 3.0L MFI L N R44LTS .040" 3.8L A G R45TSX .060" 4.3L EFI Z B R43CTS .035" 5.0L 4bbl H B,F,G R45TS .045" 5.0L H.O. G F R44TS .045" 5.0L TPI F F R43CTS .045"

*Revised from original specifications.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.