B2500 SE Regular Cab 2WD L4-2.5L VIN C (1998)
Hose/Line HVAC: Customer Interest
A/C - Booming Noise At 2,500 - 3,000 Rpm
Bulletin No. 004/98
Issued 10/22/98
Revised
Category
B (01)
Applicable Model/s
1998 B-2500
Subject
BOOM NOISE AT 2500-3000 RPM
APPLICABLE MODEL(S)/VINS
All 1998 B-2500 with A/C
DESCRIPTION
A boom noise may be heard while driving at 2500 - 3000 RPM. This may be caused by the low side A/C hose going into resonance with the engine
vibration. A bracket is now available to hold the low side A/C hose stable during engine vibration.
Customers complaining of this concern should have their vehicle repaired according to the following procedure.
REPAIR PROCEDURE
1.
Verify customer complaint.
2.
Remove approximately 2 of insulation from the low pressure A/C hose next to the front upper compressor bolt as shown.
3.
Tape both ends of the cut insulation with suitable tape to prevent the insulation from peeling back.
