Engine - A/C Belt Noise, Check Tension
Bulletin 85-1-10Date 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