Cutlass L4-138 2.3L VIN A FI HP (1990)
Spark Plug: Technical Service Bulletins
Spark Plug - Torque Specification Revised
NUMBER:
91-T-15
CORP.REF.NO: 036107
DATE:
October 1990
SECTION:
6A
SUBJECT:
SERVICE MANUAL UPDATE - SPARK PLUG TORQUE (SPECIFICATION CHANGED)
MODELS/YEARS:
1988-89 CUTLASS CIERA/CUTLASS CRUISER, 1988-91 CUTLASS SUPREME AND 1990-91 SILHOUETTE MODELS
When installing spark plugs in the 3.1 L engine, use the following revised specification.
Cast Iron or Aluminum Heads, 15 N-m (11 Lb.Ft.)
Mark a reference to this bulletin in your copy of the following service manuals:
1991
Cutlass Supreme
Pages 6D4 - 4, 5. 7
Silhouette
Pages 6A4 - 20, 46 and 6D4 - 6
1990
Cutlass Supreme
Pages 6D4 - 3. 4, 5
Silhouette
Pages 6A4 - 17, 41 and 6D4 - 6
1989
Cutlass Supreme
Pages 6A5-16 & 26 and 6D4-4
Cutlass Ciera/Cutlass Cruiser
Pages 6A4-14 & 23
1988
Cutlass Supreme
Pages 6A3-16 & 26 and 6D4-3
Cutlass Ciera/Cutlass Cruiser
Pages 6A4 -16 & 12
