77georgec
Junior Member
- Joined
- Oct 4, 2021
- Posts
- 17
- Reaction score
- 3
- Location
- ohio
- First Name
- george
- Truck Year
- 1986
- Truck Model
- scottsdale
- Engine Size
- 350
So last year i had the privelege of buying a 1986 k10. The 4.3 engine was swapped with a crate zz4 (350). When i brought the truck home i noticed that the heat didn’t work so i went about the process of rewiring it and attaching all the vacuum lines back up. Heater blower motor comes on and blows through the vents. The issue i am having is that the hoses running from the heater core are both cold, even after letting the truck idle. The top radiator hose running to the block is hot. Feels like the water isn’t circulating? Could it be the water pump possibly?