heat blower

ok my heater motor tested bad so i replaced the motor with one i had off of a 70s wag. tested and it worked put it in button every thing up turned it on can hear it run but no air flow can be felt could a blockage in the box by mice or something else maybe someone can help before i pull the entire box out

 

Pull the motor and plate back out and have a look inside with a flashlight.
You never know what you will find in there.

My squirrel cage had been eaten by mice.

 

I pulled my air intake hose out last night and it was full of dust, dirt-dobber nests, and pine needles. I have a new hose that I'm going to install. My blower works but I thought about taking it out to see what I can find. Does anyone know if the replacement motors are just as loud?
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Is the rotation correct? Pull the air intake hose with blower "ON" and see which direction the air is moving. Are the duct flappers opening and closing?

 

Don't know - I'm just glad that mine works.

The intermediate heater is pretty easy to remove. Disconnect all the controls, hoses and cables, remove the battery box (IIRC) and there are a handfull of nuts that hold the heater to the firewall. Remove these and the whole unit comes out. It would be easier to assess on the bench.

This article http://www.jeeptech.com/body/heater.html shows the well-known heater motor upgrade for the '77.5 and up CJ heater. This later heater has the motor protruding through the firewall instead of into the passenger compartment, but I expect you can do the same thing to the earlier heaters ('72-77.5). According to the parts book, the heater motor comes off of the mounting plate. You won't even have to remove the housing from the Jeep.

John Strenk gives a part number for the correct rotation motor in this post. http://forums.off-road.com/jeep-short-wheelbase/230810-77-cj5-heater-blower-motor-upgrade-2.html He also gives a copule of links to posts on CJ-offroad that are gone... maybe they are elsewhere on the net.

 

Check this thread for conversion to the GM style motor: http://www.earlycj5.com/forums/showthread.php?t=82891

 

ok i pulled the whole unit out with defrost and fresh air intake the box was full of mice nesting the heater core was stoped up with dirt tested the core no leaks the fresh air box with drain tube was full of dirt and leaves the defrost was in good shape except the hose fell apart picked up maifold tube that looks like it will work for the hose the other big tube hose was ok with a little hole in it also when i pulled the other blower motor off the wag. i was in such a hurry to see if it worked didnt look at the rotation that was the wrong way all in all not to bad at least the box and controls was with the jeep and in good shape.