Heater Hose - Revised

89jaguar04

September 21, 1989


To: All Jaguar Dealer Service Managers

Re: H-342 - 1990 XJ6 (All Variations) Coolant Hose - Heater Return to Water Pump


A number of vehicles within the VIN range 599588 to 600357 have been built with a poorly vulcanized heater coolant return hose. The factory has identified specific vehicles within this VIN range that require revised hose installation. Dealers will be provided with lists of allotted vehicles that are affected. The vehicles on these lists are the only vehicles that require revised hose installation. Parts for these specific vehicles will be automatically shipped (chargeable) to your dealership.

Under no circumstances should an affected vehicle allocated to your dealership be sold to the public or traded/sold to another dealership without first having the revised heater coolant return hose installed.

Parts Required

JLM 2124 Hose

Warranty Claims Procedure

Fault Code: H342
Repair Operation: 26.30.42
Labor Allowance: 1.45 hrs.
SHOP PROCEDURE
Replacement of the heater coolant return hose

1. Fit a fender cover and open the hood.

2. Disconnect the battery.

WARNING: The next step should be performed when the engine is cool and with the cooling system depressurized.

3. Drain the engine coolant from the radiator into a suitable clean container. The coolant will be reused.

4. Remove the air pump, refer to section 17.25.07 of the Repair Manual.

5. Loosen the hose clamp and remove the hose from the heated breather control orifice housing. Retain the hose clamp.

6. Loosen the hose clamp and remove the hose from the heater return stub pipe. Retain the hose clamp.

7. Disconnect the intake elbow air temperature sensor multiplug.

8. Loosen the hose clamp securing the intake elbow to the throttle housing. Remove the idle speed actuator hose from the elbow.

9. Loosen the hose clamp securing the air flow meter hose to the air intake elbow.

10. Remove the elbow mount securing nut and displace the elbow/hose assembly.

11. Loosen the hose clamp and remove the hose from the water pump. Retain the hose clamp.

12. Displace the engine dipstick/tube assembly for access.

13. Raise the vehicle on a lift.

14. From beneath the vehicle, remove the heater return hose to manifold "P" clip.

15. From the engine compartment, displace, remove and discard the original heater return hose.

16. Fit the replacement hose in the reverse order.

CAUTION: When installing the replacement hose assembly, ensure that it is not kinked or twisted by the "P" clip.