I have a 1986 K-5 Blazer 4X4 5.7L and I'm looking to install a heater I bought several years ago for a different truck. Its the type of heater the installs in line on one of the heater hoses. Since the box and directions were lost long ago does any one know which hose is supposed to be used the top going to the block or the bottom going to the radiator ? the heater is a thermo~pump 1500kw this is all the info I think I have any help would be great Derrick
- posted
18 years ago