Heater Hose: Service and Repair

Heater Hose Pipes To Heater Core:

Heater Hose Pipe To Mid Rail:

Heater Hose Pipes To Engine:

Remove or Disconnect

1. Engine coolant
^ Drain enough coolant into a clean container for reuse.

NOTICE: The heater core can be damaged if excessive force is applied on the core pipes during hose removal.

NOTICE: Heater hose quick connect fittings are designed to be removed by hand. Do not attempt to pry quick connect fittings from the drive belt tensioner or damage may result.

2. Heater hoses and heater hose pipes.
^ If replacing only heater hose, cut the crimp at heater hose pipe and replace it with a worm gear clamp.
A. Twist and pull quick connect fittings from drive belt tensioner.
^ Discard O-rings.
B. Squeeze clamps with pliers and slide clamps away from heater core fittings.
C. Bolt attaching the heater hose pipes to the mid rail.
D. Remove heater hose and heater hose pipes from heater core by gently twisting and pulling.

Install or Connect

1. Heater hose and heater hose pipes.
A. Squeeze clamp ends and slip new hose clamps over ends of heater hoses.
B. Install heater hoses to heater core.
^ Apply rubber lubricant to inside diameter of hoses, if necessary.
C. Bolt attaching the heater hose pipes to the mid rail.

Tighten
^ Heater inlet and outlet pipe bolt to 14 N.m (10 lb. ft.).

D. O-rings to quick connect fittings.
E. Snap quick connect fittings to drive belt tensioner
^ Pull back on quick connect fittings to verify proper connector engagement.
2. Engine coolant.
^ Use coolant drained earlier only if it is uncontaminated. Discard contaminated coolant and add fresh 50/50 coolant and water mixture.

Inspect
^ Be sure installed hose does not sag or rub against other components. Adjust or support hose as necessary to correct hose position.
^ Operate engine and check hose installation for leaks.
^ Check coolant level after engine has been warmed up. Add coolant as necessary.