Cutlass Supreme FWD V6-204 3.4L DOHC (1991)

Spark Plug Wire: All Technical Service Bulletins
Spark Plug Boots - Damage By Mishandling
NUMBER:
91-T-93
CORP.REF.NO: 136403R
DATE:
April 1991
SECTION:
6D, 6E3
SUBJECT:
SPARK PLUG BOOTS MAY BE DAMAGED BY MISHANDLING
MODELS/YEARS: 1991 CUTLASS SUPREME WITH 3.4L (VIN X) ENGINE
Figure 4
The spark plug boots on the 1991 Cutlass Supreme wfth the 3.4L (VIN Code X) engine use a "T" handle design (see Illustrations on page 6D4-7, in Vol
1 of the 1991 Cutlass Supreme Service Manual). They are designed to reach into the head, and to be easily removed without tools. Because of tolerance
stack-up conditions, the boot may be lower in the head than it should be, making it difficult to remove. The boot is made of plastic, which may break if
pried with a screwdriver.
DO NOT pry on one side of the boot with a screwdriver to remove it. The boot can usually be removed by hand by twisting to loosen it, then pulling out.
If the "T" is too low to allow a good grip, pliers may be used if handled carefully, or use TWO screwdrivers to apply pressure to both sides of the handle
at the same time.
In addition, care should be used when installing the boot, to avoid tearing it. Make sure that the boot is correctly located over the spark plug end before
applying pressure to seat the boot.
IGNITION SYSTEM
6D4-7
SPECIFICATIONS
FASTENER TORQUE SPECIFICATIONS
Spark Plug (3.4L Engine)
................................................................................................
24 N-m (18 lb.ft.)
Spark Plug (3.1L Eng'ne)
................................................................................................
24 N-m (18 lb.ft.)