Best Seller | 1985-1991 Volvo 740 Heater Hose - MacKay W0133-1637023 Volvo 740 Heater Hose. Brand: MacKay. Fits Years: 1985, 1986, 1987, 1988, 1989, 1990, 1991, 85, 86, 87, 88, 89, 90, 91. Inlet - Cylinder Head to heater unit This hose will have to be cut in two in order to install the heater valve. Use old hose to... more | | $14.97 go to store |