Rebuilt blower motor? Need advice for 82 CD
 

Hi guys,

The blower motor is toast on my 82 CD. Fall is approaching so I am starting to think about those cold MBZ mornings again.

So it looks like a New Blower runs around $400-$500. Used ones on ebay (no idea how long or IF they actually work are around $50-$100.

My question is, does anyone know of a place that sells REBUILT blower motors? Any thoughts as to the cost and quality?

Can you order just the motor with out the squirrel cage? I paid $110 for a new Bosch without the cage. The price is obnoxiously high with a plastic cage added.

$3 worth of brushes will fix most of 'em.

Providing the bearings are still good. I wish they were easy to rebuild.

Make sure it has failed. I tested one in car, nothing. After getting on the work bench, I tested it again, works fine. I reheated some cold solders, it's working now.

bench test it before getting rid of it. I have had some that didnt work in the car, removed it bench tested it and it worked and worked in the car.

This is something you can rebuild yourself, but to answer your question there is a place out of WA, merc.....source.com that sells just the motor sans squirrel cage. They're more expensive than just about everyone 'cept the dealer.

I have a spare that I'd sell you, but don't think it'd help cause I'm not sure it works or how much life the brushes have left, etc.

Observation....
 

My '85 300D....removed the blower from car and found that it would run....put back in car made noises (like bad bearing).....took it out.....removed the plastic cover/mount from the motor/blower.....noticed some interesting marks on inside of cover/mount.....put 1 flat washer over screw, between plastic piece, and motor itself, during reassembly......works fine......it appears that "over time" the motor and thus the blower cage had settled a bit.....the washer shims the whole assembly up about a mm or two......now blower cage does not contact plastic mounting piece when in the vertical position.

SB

300SD Blower removal
 

How do I remove the blower fan on the 1985 300SD...I've removed some screws from the carpeted panel but the panel doesn't budge.
I'm pretty sure it's dead (worked but noisy, then worked if you punched the area below the glove box)

Here's a pic of mine, you see a couple of screws, find 'em all and work it out, it's been there for decades!
The second pic is of the fan that would not turn even when I put power to it from a battery while it was in the car, I took it out and using the same power supply, viola! It spins!

not sure if this works or not but i think if you open the sunroof a few inches with hot water flowing through the core you can get a vacuum to form in the car and get hot air slowly through the vents.



Id take the blower apart. Most of the time its something you can fix if you just try. If not just buy the motor off a forum member

Some observations about W123 blower motors -
First check the 16 amp fuse to make sure it isn't melted (cheap aftermarket plastic fuse) or melting the fusebox itself. Some W123 fuseboxes have a pair of unused fuse contacts. In extreme cases it may be neccessary to transfer the blower wire-terminals to those unused contacts. Or else wire in a heavy-duty inline fuse holder.

There are differen design W123 blower motors. On some, like an '80 300D I repaired many years ago, the brushes were accessible. Others, like the one in my '82 240D, are not.

Many of the plastic W123 fans I've seen, have a steel hup pressed onto the motor shaft. It may be impossible to remove the fan-blade without destroying it.

I was recently told that Mercedes now wants around $800 for a new W123 blower moter, including the fan-blade and plastic bottom cover!

But, I just got a good used one from the Virginia-Beach Pick-N-Pull for $15!

Good luck & Happy Motoring, Mark