Dash Area - High Pitched Belt-Like Squeal Noise
NUMBER: 07-001-02GROUP: Cooling
DATE: Jan. 11, 2002
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 07-005-01, DATED SEPTEMBER 14, 2001, WHICH SHOULD BE REMOVED FROM YOUR FILES. THIS IS A COMPLETE REVISION AND NO **ASTERISKS** HAVE BEEN USED TO HIGHLIGHT THE CHANGES.
SUBJECT:
Belt-Like Squeal Sound at High Engine RPM
OVERVIEW:
This bulletin involves replacing the heater core return hose and replacing the variable restrictor with a fixed restrictor.
MODELS:
2001 - 2002 (RS) Town & Country/Caravan/Voyager
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 3.3L ENGINE AND WITHOUT REAR HVAC (SALES CODE HBB) AND WITHOUT AN ENGINE OIL COOLER (SALES CODE NHA).
SYMPTOM/CONDITION:
With the engine at 3000 RPM or higher, a belt-like squeal sound may be heard from the center of the dash area. This sound is similar to the sound produced by a worn/loose accessory drive belt or faulty generator.
DIAGNOSIS:
Start engine and apply the parking brake. Open and support the hood. From the engine compartment, accelerate the engine to produce the sound (3000 RPM or higher). Use pliers to pinch oft the heater core return hose (top hose) between the heater core outlet tube and the in-line restrictor. If the noise is eliminated, perform the Repair Procedure.
PARTS REQUIRED:
REPAIR PROCEDURE:
WARNING:
TO PREVENT INJURY, ALLOW THE ENGINE TO COOL BEFORE PERFORMING THIS REPAIR. WHEN THE ENGINE IS AT OPERATING TEMPERATURE, ENGINE COOLANT IS HOT AND UNDER PRESSURE.
1. Using pliers, remove both tension clamps from the heater core return hose (top hose to heater core) (Fig. 1).
2. Remove and discard the heater core return hose and restrictor.
3. Install the new restrictor into the coolant tube as shown in (Fig. 2)
4. Install the tension clamps to the new heater core return hose.
5. Install and fully seat the heater core return hose onto the coolant tube and the heater core outlet tube. Install the tension clamps.
6. Fill the coolant recovery/reserve container to the full level using a 50/50 mix of Mopar coolant (p/n 05066386AA) and distilled water.
7. Start the engine and check for coolant leaks.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
FAILURE CODE: