John Browning
Junior Member
My son is working on his 1982 D150 with a slant six and I am trying to help him. We purchase this vehicle about 5 months ago. It was not running, replace the ignition system and got it running and he was driving it on a regular basis. The water pump started leeking, so we replaced it (A/C Delco from rock auto) and installed new belts. New water pump on and he was back on the road. A week or so later he blew a heeter hose. When I was inspecting it and found the heater hose blew I also notice the alt/fan belt was off ( maybe it came off before the heater hose blew, not sure). Replaced the heater hose and put the belt back on. When I wes filling the cooling syste I noticed the radiator was leeking as well. Replaced the radiator and put everythin back together and now the alt/fan belt keeps coming off. upon further inspection it looks to me that the altenator pulley does not exactly line up with the crank and fan pulley. It looks like it is set back a little. Every picture I can find shows the alt/fan belt is the midle belt, the air pump being the most inner belt (air pump has been removed), and power steering being the most outer belt. The altenator pulley looks like it would line up with the most inner groove of the crank, but then would not line up with the fan. Any thought on this issue?