Century Estate Wagon V6-231 3.8L (1985)
Drive Belt: All Technical Service Bulletins
Engine - A/C Belt Noise, Check Tension
Bulletin 85-1-10
Date
Feb '85
Ref. No.. 85-016-1
SUBJECT:
AIR CONDITIONING NOISE
MODELS AFFECTED:
ALL BUICK BUILT V6 ENGINES LESS SINGLE DRIVE (SERPENTINE) BELT
Many A/C related noises can be corrected by proper tensioning of the Air Conditioning belt. If a condition of noise with the A/C on is reported, the belt
tension should first be checked with an approved belt tension gauge such as Kent-Moore J-23600 and tensioned per chart. When replacing the A/C belt
or concluding a repair that requires removal or loosening of the A/C belt, care should be exercised to adjust belt back to proper tension.
BUICK V6 A/C BELT TENSION CHART
Engine
VIN
Sales
Engine
A/C Belt Tensions
Code
Code
Engine
Max (New)
Min (Used)*
LK9
E
3.0L
750 N
400 N
(165 lbs.) (
90 lbs.)
LN3
3
3.8L MFI
750 N
400 N
(165 lbs.) (
90 lbs.)
LM9
9
3.8L SFI
650 N
350 N
Turbo (
150 lbs.) (
80 lbs.)
LC4
4
4.1L
650 N
350 N
(150 lbs.) (
80 lbs.)
LD5
A
3.8L
650 N
350 N
(150 lbs.) (
80 lbs.)
*Spec. -0 + 50 N