Despite the fact it's 95 degrees out, I have my heater unit out of the rig working on the Terry Howe upgrade, which you can find here:
Anyway, I have a small problem and could use advice.
1. I tried a 73 Blazer blower motor for a truck with the 350 and AC: the flange fit great and the fan fit over the shaft, but the shaft was way too long, which meant the fan bottomed out inside the heater housing, leaving the flange over 3/8" from seating.
2. I had NAPA check: the same blower motor was used in both AC and non AC trucks that year. NAPA had no more alternatives for me.
3. Schuck's Auto found me a blower motor (they catalogue it for a 74 GMC pickup with 350 and AC) that does much better: the flange mates up fine and the shaft is much shorter, although still too long. The interference with the fan only prevents the flange from seating by about 1/16" with this unit.
I figure I've gotta go with this one, so the question is:
Do I cut on the internal partition that is interfering with the squirrel cage fan? It could be cut or rasped by enough to give clearance.
Or do I find somebody with a drill press and use it and a 1 1/4" paddle drill bit to shave enough off the center of the fan so it'll seat deeper on the shaft, thereby eliminating the interference?
Sorry this is not clearer. I could show you by drawing on napkins if we were having coffee, but I have no way to use graphics here. I think anybody who's worked on a CJ heater unit, 77 to 86, will understand.
Any help appreciated.
Bone stock '81 CJ7.
"You can always see it coming. But you can never stop it."
-- Cowboy Junkies.