Cavalier L4-2.2L VIN 4 (1998)
Heater Hose: Customer Interest
Engine/Transmission - Whine at 2800-3200 RPM
File In Section: 01 - HVAC
Bulletin No.: 99-01-38-003
Date: September, 1999
TECHNICAL
Subject:
Engine/Transmission Whine at 2800-3200 RPM
(Replace Heater Inlet Hose)
Models:
1997-2000 Chevrolet Cavalier
1997-2000 Pontiac Sunfire with 2.2L Engine (VIN 4 - RPO LN2)
Condition
Some customers may comment on a whine from the engine/transmission at 2800-3200 RPM.
Cause
The production released heater inlet hose has an internal coolant flow restrictor. The flow of the coolant through the restrictor may induce a
whine/whistle. In some cases the flow restrictor may migrate and come in contact with the heater core inlet tube. If the restrictor comes in contact with
the heater core inlet pipe the whine may become audible within the passenger compartment of the vehicle.
Correction
Replace the heater inlet hose (P/N 22615693). Use the procedure found in the HVAC section of the Service Manual. The new part has a stainless steel
clamp over the hose under the insulator where the flow restrictor is positioned. If the clamp is missing on the hose, do not use. All parts currently in
GMSPO stock are of the new style.
Parts Information
Part Number
Description
22615693
Hose, Heater Inlet
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
D2774
Hose, Heater Rear Inlet
0.9 hr
(With Air Conditioning)
- Replace
