i,m sure it's been ask before but here goes. 79 4x4 400cid need to replace the blower motor but having a real hard time. has AC and not sure if i need to take out the heater core and bring it out from the inside or try and do it from under the hood.

i,m really not sure about messing with the AC things but can't figure out anything else. any help i would love. Thanks guys

 

oh geez, i feel for you! been there, done that!

you have to remove the outer ac housing from the firewall to acces the blower motor.
i think all but a couple of the bolts are on the inside under the dash and behind the glovebox. then you have to swing the evaporator out of the housing to get to the motor.

i have seen a couple of guys work the old fan over after removing the plate from the front of the ac housing, then screw the fan on from the ouside.

 

https://www.ford-trucks.com/article/...es_Trucks.html

 

do it the way the above link says and you'll be ok,it's alot of work but it's the only way. I've seen more than one barfed up by somebody trying to take a short cut... there aren't any

 

thanks guys i,ll give it a try in the morning. good thing the snow is over here. well i think it is. but hey got all summer to work it out.

 

By 'outer ac housing' are you referring to the box under the hood? If so, I recommend against that method. Try the procedure that Million posted a link to. You can access everything from under the dash. Also, using that procedure, you do not have to vent the AC system. The procedure is good for R & Ring the heater core and the blower fan. It is also the way Ford intended the job to be done.

 

Talon -

I'm one of the guys mentioned who dug through the crap and removed the blower motor and cage, drilled out the rivets holding on the front panel of the heater box (closest to the passenger side valve cover), and then mounted the blower motor on the outside with screws, and replaced the drilled rivets with bolts.

Haven't had to replace the blower since, but man will it be a piece of cake when I do.

Here's a post I made about doing it the hard way - and someone posted on doing it an easier way -

https://www.ford-trucks.com/forums/3...ghlight=heater


Also, since you are going to have to have the whole thing out anyways, here's another trick I thought of - then found out I wasn't the only one when I came across a heater box in a junk yard that did the very same thing.

Cut out the plastic housing above and surrounding the heater core, then use a good gasket sealer (what's that cheese-it kind of stuff called?) and seal the cut. Next time you have to replace the heater core, you dont have to dig the whole thing out again. I'm also going to add some strips of metal to mine where I cut it at the top, to add more support. Note that I have not done this yet on mine (just seen it on another), but that's what's gonna happen next time that heater core goes bad. I'll be damned if I'm gonna go through all this again, especially with summer temps the way the are here. With my timing my next time will come up during the summer.

You mentioned snow there - I don't know if that's better or worse than the 110+ temps it was when I had to replace my blower motor the last time (when I mounted it outside, too).


Either way, I feel for ya. It's a