Heater Hose: Service and Repair
HEATER HOSE ASSEMBLY REPLACEMENTREMOVAL PROCEDURE
1. Partially drain the engine coolant.
2. Remove the inlet and outlet heater hoses from the water pump.
2.1. Squeeze the hose clamp together with pliers.
2.2. Slide the hose clamp away from the water pump fitting.
2.3. Gently twist and pull the heater hose from the water pump fitting.
2.4. Remove the heater hose.
2.5. If the heater hoses cannot be removed easily perform the following steps:
2.5.1. Cut the hose forward of the hose pipe.
2.5.2. Cut the hose remaining on the water pump fitting lengthwise. Remove the heater hose.
3. Remove the bolt attaching the inlet and outlet hose bracket at the mid rail.
NOTE: Do not apply excessive force on the heater core pipes during hose removal. Applying excessive force on the heater core pipes may damage the heater core pipes.
4. Remove the inlet and outlet hoses from the heater core.
4.1. Squeeze the hose clamp with pliers.
4.2. Slide the clamp away from the heater core fittings.
4.3. Gently twist and pull the heater hose from the heater core fitting.
5. Remove the inlet hose from the module retainer.
6. Remove the inlet and outlet hoses from the vehicle.
INSTALLATION PROCEDURE
1. Install the inlet and outlet hoses to the vehicle.
2. Install the inlet hose to the module retainer.
3. Install the inlet and outlet hoses to the heater core.
3.1. Apply lubricant to the inside diameter of the heater hose, if necessary.
3.2. Push the heater hose onto the fitting with a twisting motion.
3.3. Squeeze the hose clamp ends together and slide the clamp over the end of the heater hose.
3.4. Install the clamp beyond the bead around the fitting.
3.5. Install the other heater hose.
NOTE: Refer to Fastener Notice in Service Precautions.
4. Install the bolt attaching the inlet and outlet hose bracket at the mid rail.
Tighten
Tighten the heater hose bracket bolt to 14 N.m (10 lb ft).
5. Install the inlet and outlet heater hoses to the water pump.
5.1. Apply lubricant to the inside diameter of the heater hose, if necessary.
5.2. Push the heater hose onto the fitting with a twisting motion.
5.3. Squeeze the hose clamp ends together and slide the clamp over the end of the heater hose.
5.4. Slide the hose clamp away from the water pump fitting.
5.5. Install the clamp beyond the bead around the fitting.
5.6. Install the other heater hose.
6. Add the engine coolant:
^ If the previously drained coolant is uncontaminated, use the previously drained coolant.
^ If the previously drained coolant is contaminated, discard the contaminated coolant.
Then, add a fresh 50/50 DEX-COOL and water mixture.