C 3500 Truck 2WD V8-454 7.4L VIN J SFI (1999)
Heater Hose: Service and Repair
Inlet Hose
REMOVAL PROCEDURE
TOOLS REQUIRED
J 38723 Heater Line Quick Connector Separator
1. Drain the engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
2. Disconnect the inlet hose (1) from the generator bracket.
3. Disconnect the inlet hose at the fender clip.
4. Loosen the hose clamp at the heater core enough to slide the clamp away from the fitting on the inlet hose.
5. Remove the hose clamp at the heater core, the water shut off valve, or the tee fitting.
6. Disconnect the inlet hose from the heater core.
7. Push the inlet hose (5) into the connector (1).
8. Insert the J 38723 into the connector in order to release the locking tabs (2).
9. Pull the retainer (4) and the inlet hose from the heater inlet connector.
10. Inspect the O-ring sealing surface on the inlet hose.
11. When replacing the heater inlet connector, remove the retainer from the hose. Discard the retainer.
12. When replacing the inlet hose, but not the connector, complete the following steps:
12.1.Remove the retainer from the inlet hose.
12.2.Reinsert the retainer in the connector.
13. When reusing the inlet hose and the container, keep the retainer in place on the hose.
INSTALLATION PROCEDURE
