LeSabre V6-181 3.0L (1986)
Drive Belt: Customer Interest
Engine Drive Belt - Chirp or Squeal
Bulletin :
90-6-7
Date :
June, '90
Ref. No. :
90-128-6
Corp. Ref.. No. : 806103R
SUBJECT:
BELT CHIRP OR SQUEAL
MODELS AFFECTED:
SOME 1986 THROUGH 1990 SKYLARKS, CENTURYS, LESABRES, PARK AVENUE/ELECTRAS, AND
RIVIERAS EQUIPPED WITH 3.8L SFI ENGINES (VIN CODES 3, B, C AND N) AND 1986 LESABRES EQUIPPED
WITH 3.OL MFI ENGINES (VIN CODE L)
THIS BULLETIN SUPERSEDES BULLETIN 88-6-15 DATED MAY, 1986, DUE TO A CHANGE IN MODELS AND ENGINES AFFECTED.
PLEASE DISCARD 88-6-15 AND REPLACE IT WITH THIS REVISION WHICH PROVIDES ADDITIONAL APPLICATION COVERAGE.
Some 1986 through 1990 vehicles equipped with a single belt accessory drive (SBAD) system, may experience a belt chirp or squeal that cannot be
corrected by normal service procedures. It has been determined that the root cause of this condition is pulley misalignment. The following procedure
may be used to correct alignment as necessary.
FIGURE 1
The two most likely pulleys requiring alignment are the A/C compressor or crankshaft pulley. To determine which component must be shimmed, visually
sight belt spans No. 1, 2, and 3 from View "A", (See Figure 1).
