In my quest for perfection and to feed my self-professed Jaguar OCD, I decided to take apart the passenger blower motor assembly. There was this terrible screeching when on high speed more than once in a while. I know from past experience with motors that the sound is from the shaft vibrating in its bearing or bushing. And that it requires a bit of oil. As the upper scuttle and glove box was already out, now was the time. It came out fairly easily, and apart fairly easily. So before assembly my question to the group is - Do the brushes look like they need replacing? I don't know how long new brush is. The ones in there measure 7mm x 7mm x 10mm. I don't it would be hard to obtain new ones, so I'm hoping there's plenty of life left in these. I burnished the armature with emery cloth and it looks fine. And of course, will test the whole thing out before re-installing it back into the car. Suggestions? Comments?



Do you think I need new brushes??

 

If all else fails, I have a pair of blower motors for the asking. I bought them to replace mine because they were squeaking, but like you I took them apart and serviced them. I got some brushes from Harbor freight and filed them down to fit. They work really well now.

 

I don't think you need them - as in the fan will still work if you reassemble it like that.
But I also think that while you have it all apart - when's going to be a better time to replace them?

 

Sanchez - thank you for the offer, but I'm sure I am okay with this motor with either new brushes filed down as you say, or leave them as be. I'll research new brushes, but if I can't find them, then back together she goes. And, since I posted, I put it all together loosely (not back up in place where it should be, but on the passenger floor) and find the blower blows the air OUT of the big square hole and not suck it in. I'm sure I've connected all wiring properly! Maybe my thinking is wrong???

 

I think I just figured it out. My thinking was wrong. The blowers are supposed to be taking air in from the bottom of the assembly and exiting it out the big square hole and blowing it into the evaporator coil and the heater coil.

 

You got that right.!!!

 

The way I have it figured is that this blower assembly sucks air in from the bottom flap when open for "recirculate" air in the cabin. And when it closes, opening the upper flap, draws in fresh air from the cowl in-between the the windshield wipers, for outside air to get in. All other vacuum flaps direct "conditioned" air to different vents throughout the cabin.

 

Was going to tell you that!!!!!!

 

Good Job, Bill!
Now, to put it back, the FUN will be getting the pliable duct around the fan outlet correctly.
Otherwise all that Hot (or cold) air will be wasted under the dash area.
I used the 90* pick from selection.
(';')

 

When I was reinstalling my blower motors, I introduced the blue ducts slightly on the blower motor then wrestled the blower motor into its position. The driver side was a lot more difficult to install with all the stuff under there. Once done it's a sigh of relief and aches and pains from all the contortion required to install the driver side.
Of course, it would be a lot easier if I had removed the driver seat and lowered the steering column but for some reason I never go the easy route.

 

I plan on fully installing and taping the square end to the pliable rubber "manifold" to the assembly before installing in place. We'll see how that works. I can always remove the dash crash pad (only four screws) to access more room. I'll let you know how it goes tomorrow.

 

Well, what Sanchez describes is actually the way I did mine, but somehow I understood you didn't want to do it that way.
See here and post 5:
https://www.jaguarforums.com/forum/x...1/#post2415229
(';')

 

Blower motor assembly ready to install. Had to use slight heat with a heat gun, but got the rubber manifold on, then taped. Then installed the entire assembly into the car. Was a piece of cake. Having the glove box out was a MAJOR help. Could very much see what I was doing. Especially at the top of the assembly where it shoehorns into the upper intake chamber. Fired it up once installed and works great! One more project to cross off the nice to do, but not need to do list.


Blower motor ready to install

 

Everytime I work on my XJC , it feels like owning a Jag is like owning a magnificent work of art painted with water colors.