Fan Viscous Drive - Scraping Noise/Radiator Damage

NO: 07-03-98

GROUP: Cooling

DATE: Apr. 10, 1998

SUBJECT:
Fan Viscous Drive Contacts Radiator

MODELS:
1998 (XJ) Cherokee

NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH 4.0L ENGINES, BUILT PRIOR TO JANUARY 12, 1998, (MDH 0112XX)

SYMPTOM/CONDITION:

The fan viscous drive may contact the radiator causing a scraping noise and/or damaging the radiator.

DIAGNOSIS:

Inspect the radiator. If any signs of damage are present indicating that the fan viscous drive has made contact with the radiator, perform the Repair Procedure.

PARTS REQUIRED:

NOTE:
HEAVY DUTY COOLING IS INCLUDED ON VEHICLES EQUIPPED WITH TRAILER TOW AND UP COUNTRY SUSPENSION. IT IS ALSO AVAILABLE AS A FLEET STAND ALONE OPTION. THE SALE CODES WHICH INCLUDE HEAVY DUTY COOLING ARE: AHT, NMC & AWE. REFER TO THE CURRENT MOPAR PARTS CATALOG FOR APPLICABLE PART NUMBERS FOR HEAVY DUTY RADIATORS.

(AR) 05012883AA Radiator - Automatic Transmission - Standard Cooling
(AR) 05012884AA Radiator - Manual Transmission - Standard Cooling
2 52059304AA Cushion - Use with Heavy Duty Cooling

REPAIR PROCEDURE:

This bulletin involves replacing the radiator and installing a restrictor cushion on vehicles equipped with heavy duty cooling.

WARNING:
ALLOW ADEQUATE TIME FOR THE ENGINE AND COOLING SYSTEM TO COOL PRIOR TO ATTEMPTING THIS REPAIR. SERVICING THE SYSTEM WHILE THE COOLANT IS HOT CAN LEAD TO SERIOUS BURNS.

1. Disconnect the battery negative cable.

2. Remove the radiator cap.

3. Remove the grill to gain access to the drain petcock. Install an adequate length of 1/4 inch hose to petcock and drain the coolant into a clean container, saving it for later use.

4. Disconnect the electric cooling fan.

5. Remove the cooling fan shroud attaching screws and lift the shroud up, hanging it over the mechanical fan.

6. Disconnect and plug the transmission cooling lines if equipped. If equipped with a remote transmission cooler, remove the cooler from the bracket.

7. Disconnect both radiator hoses at the radiator. Special tool number 6094 is required for removal of the constant tension hose clamps.

8. Mark the position of the hood latch striker and remove the striker.

9. Remove the upper radiator cross member.

10. Separate the A/C condenser from the radiator, if equipped.

11. Lift the radiator up and out of the engine compartment.

13. Install the new radiator, reversing the removal procedure. Tighten the radiator cross member to isolator nuts to 10 Nm (86 in. lbs.) Tighten the isolator to radiator nuts to 5 Nm (47 in. lbs.). Tighten the electric cooling fan and fan shroud screws to 3 Nm (31 in. lbs.)

14. Fill the system with the coolant removed previously. Operate the system to purge any trapped air from the system and top off the coolant if necessary.

15. Check the automatic transmission fluid level and top off if necessary.

HEAVY DUTY COOLING EQUIPPED VEHICLES (Sale Codes - AHT, NMC, AWE)

NOTE:
INSTALLATION OF THE RESTRICTOR CUSHION IS NOT REQUIRED FOR VEHICLES EQUIPPED WITH STANDARD COOLING.

1. Raise the vehicle on a hoist and support the engine with an adjustable jack stand.

2. Remove the left engine support cushion through bolt.





3. Install the restrictor cushion, p/n 52O59304AA between the support and the rear of the bracket as shown in Figure 1. The restrictor must be located at the rear, with the coned end facing forward. (Figure 1)

4. Install the through bolt and tighten it to 65 Nm (48 ft. lbs.).

5. Repeat the procedure for the right side making sure that the restrictor is at the rear.

POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:

Labor Operation No:
07-30-10-98 Radiator, Replace 0.7 Hrs.
07-30-10-65 With Air Conditioning - Add 0.1 Hrs.
07-30-10-61 With Automatic Transmission - Add 0.1 Hrs.
09-40-10-96 Bushings, Engine Mount - Install 0.4 Hrs.

FAILURE CODE: P8 - New Part