Grand Prix V6-191 3.1L (1989)
Spark Plug: Technical Service Bulletins
Spark Plug - Torque Specification Update
Bulletin Number:
91-6-8
Reference Number:
036107
Publish Date:
10/90
SERVICE MANUAL UPDATE - SECTION 6D
Subject:
SPARK PLUG TORQUE SPEC.
(CHANGED SPECIFICATION)
Models
1988-91 6000, GRAND PRIX, SUNBIRD,
Affected:
FIREBIRD AND TRANS SPORT MODELS
WITH 3.1L
SERVICE MANUAL UPDATE SECTION 6D
NOTE:
Per notice in the Service Manual, it is important, especially on aluminum cylinder heads, to allow engine to cool before removing the spark
plugs to avoid thread damage.
When installing spark plugs in the 3.1L engine use the following revised specification in the Service Manuals listed below:
