Fuel Tank Area - Creak/Groan/Crunch/Squeak Noises
90cadillac14Bulletin No. T-91-21
File in Group 10
Number 195
Corp. Ref. No. 011522R
Date NOV. 1990
SUBJECT: FUEL TANK NOISE
MODELS AFFECTED: 1987-1990 ALLANTES
Some 1987-1990 Allantes may exhibit a noise from the fuel tank area. This noise is most likely noticed when the body is put in torsion, such as driving into a driveway or crossing a speed bump. The noise may be described as a creak, groan, crunch, or squeak.
This condition may be caused by insufficient fuel tank to body and/or fuel tank strap to fuel tank isolation.
To repair this condition the following service procedure should be performed:
1. Drain and remove the fuel tank using the procedures outlined in the Cadillac Allante Service Information Manual, Section 6C.
Figure 1 - Isolator Strips Location:
2. Inspect the fuel tank for the presence of seven isolator strips located as shown in Figure 1. Individual isolation strips may be ordered as P/N 3523199.
Figure 2 - Added Isolation Strips:
3. Add four isolation strips, P/N 3523199, along the front of the fuel tank as shown in Figure 2.
4. Add 3M No. 5430 Squeak Reduction Tape(R) or equivalent to each tank strap between the strap and tank (two strips required for each strap). Cut length to 770 mm (30.3"), peel off adhesive backing protective strip, and apply to strap overlapping as necessary. Refer to Figure 2.
5. Raise and position the fuel tank to the vehicle. Position fuel tank straps in their original location and torque the fasteners to 35 N-m (25 lbs.ft.).
6. Assure that the fuel tank weld flange is not contacting the tank strap support anchor or the strap. if contact is noted, reform the flange to provide clearance.
Parts are currently available from GMSPO.
For warranty purposes use Labor Operation L1260 at 1.3 hours.