Ciera V6-173 2.8L VIN W FI (1986)
Frame: All Technical Service Bulletins
Frame - Popping Noise During Braking and Accelerating
SUBJECT
FRAME NOISE
NUMBER: 86-T-27
DATE:
April 9, 1986
1984 OMEGA MODELS, 1984-86 CUTLASS
MODELS/YEARS
CIERA MODELS BUILT PRIOR TO MARCH
SECTION: 2A
1986
Some 1984-86 Cutlass Cieras and 1984 Omegas may exhibit a popping type noise during braking and acceleration. The popping noise, caused by a fore
and aft shifting of the frame, can be felt as "oil canning" in the floor pan. (The popping noise should not be confused with a "click" or "clunk" felt in the
steering wheel -- covered in the September 1984 Service Guild).. Another similar sounding noise, "crunching", could be caused by loose frame mount
bolts. Torque should be 115 N-m (85 ft.lbs.).
FIGURE 1
If the noise is still present after tightening the frame bolts, it can be corrected by installing shims on both rear frame mount insulators as shown in Figure
1. The intent of this fix is to create an interference fit using shims. Multiple shims may be used if necessary.
Shims may be fabricated from any available steel or brass shim stock. Thickness should be approximately .635 mm to 1.02 mm (.025" to .040").
The following procedure should be followed when installing shims:
1.
Support frame with a jack stand on the rear cross member.
2.
Remove one (1) rear frame bolt at a time and lower the jack stand enough to remove pressure from the mount.
CAUTION: Damage to the steering intermediate shaft could result if the frame is lowered more than required to free the mount.
