Article 928 - Heater Hose Replacement

TSB #49 - November 4, 1966
(All 1966 Car Lines)

The heater hoses in air conditioning and heating systems which utilize a water control or shut off valve in the heater water circuits are subjected periodically to high pressure which sometimes results in hose failure. Beginning Job #1, 1967, all car lines will be equipped with new hoses having increased burst strength and greater durability. Also, heater hose replacement intervals have been revised; heater hose replacements on 1966 and 1967 vehicles should now be made concurrent with engine coolant replacement at 36,000 miles or 24 months.

If heater hose failures are encountered on 1966 vehicles, the following hoses should be used:

New Part ClassApplication
C6AZ-18472-HC 1966 Ford 6 Cylinder with thermactor
C6AZ-18472-JC1966 Ford 352 engine
C6GY-18472-AC1966 Fairlane - Falcon 289-390 engine
C6SZ-18472-AC1966 Ford 6 Cylinder with thermactor
C6MY-18472-AC1966 8 Cylinder 289-390-428 engine