Ford 2003 Mustang Workshop Manual page 3100

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4. NOTE: A slight twisting motion while pulling on the heater water hose may be necessary to

assist in the removal.

Pull the heater hose away from the heater core tube.

5. Spread the retainer tabs apart and slide the retainer off the tube.

Discard the retainer.

1. Clean the tubes and lubricate with coolant hose lubricant or plain water.

2. Install a new coupling retainer (18D434) into the heater hose coupling housing.

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