OK, my A/C is working and charged, but I'm still not getting much airflow. I took out the blower motor [what fun!] and checked it with 12 volts. It runs, but doesn't seem like it turns fast enough. Went to get a replacement at NAPA and all they had was chinzy, light-duty Chinese replacement with about half the motor (armature size) as the original.

My question: Has anyone taken an original Delco blower motor apart and put in new brushes and/or bushings to rebuild it? If so, I need info on how and what to do. Thx.

 

Well, as long as you have it out, get a blower for a C4, it has a bigger more agressive fan and a faster motor = more air. See if you can get a mirror and a light in the duct to check for dir, leaves, desicated furry animals in there against the evaporator. And lastly seal up all the air leaks in the ducts and make sure the doors all work.

 

Man, I've tried to find a way to get a look in there...but it's really tight! I will try to rig up a hose on my shopvac to see if I can get anything out of it. I've checked out all the door functions and re-sealed the kickpanel door, already. The blower I took out just has three little tack welds to hold it together. Can't I just cut those off and take it apart to check it out? [Then tack it back together when done? ...or pitch it and replace it.]

 

1) Someone in the NCRS crowd will rebuild them.

2) Untill you have the new brushes, why take it apart?

3)They do make special bits to drill out spot welds to re-use the holes.

4) Try the Doc

 

http://cgi.ebay.com/ebaymotors/68-69...spagenameZWDVW

This guy says he has new GM

 

bump

 

Read my thread on this bro.

http://forums.corvetteforum.com/show...4+blower+motor

 

c4 fan and replace the seals. Makes a big difference.

 

Thanks for the "head's up" on the C4 blower. I'll keep that in mind as my "Plan B" (which I will probably end up doing...when I screw the original). But I still want to pursue the rebuild idea, if I can.

Still looking for info on disassembly and rebuild of the original motor.

 

http://home.comcast.net/~rjcweb1/Blo...eplacement.htm

All I can find.

 

Thanks, B-Bird. All information is useful and appreciated!

 

As I usually do [when confronted by an insurmountable task], I tore into the original blower. When you get the thing out, it has two housing pieces; the main sheet metal body and a stamped metal "cap" on the inside of the first housing. The cap is tack welded in three spots to hold the pieces together. I used my handy-dandy Dremel w/cut-off wheel to cut through the welded areas, then put the cap in my vise and tapped the housing and guts off of the cap. I couldn't get the stator and armature out of the housing (pressed in), but found that there was still plenty of material left on the contact brushes and no damage on the commutator. There is some material next to the spindle bushing in the cap for oil to be soaked up...and, of course, it was completely dry (probably for the last 20 years or so). And after taking out the rubber vent tube, I squirted some oil in the housing end toward its bushing. After cleaning out the dirt, etc. I put the cap back on and in position. Now I have to find someone with an arc welder to tack it back together. I did try putting 12v. on it before and after my efforts...it ran in a "labored" fashion before disassembly and runs much faster and smoother afterwards. So, I have some hope for improvement. The real "joy" will be trying to "finaggle" the blower back into position through the right side fender vent area again. Oh well, that's called the "learning curve"...right?

 

So, since DC motors generally just run till the brushes fail, then quit, it was just "dirty and dry."

 

I think that's about it. If it runs dry for too long, the bushings could go, but mine felt OK. We'll see how long it lasts after I get it back in... [IF I get it back in!]

 

Got the blower housings spot-welded back together, installed the motor, wiring, etc. Fired it up and "voila!"....cold air blowing through those vents. Can't believe how much difference it made...well worth the trouble.