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E34 (1989 - 1995)

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  #1  
Old 02-13-2014, 08:01 PM
Doktor Bert's Avatar
Doktor Bert Doktor Bert is offline
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The Evil E34 Auxiliary Fan Exorcism:

Out! Out! You Demons of Stupidity!!!! Why must you crimp things together so they cannot be repaired!!!!

The fan is not too bad to get apart. It has a bronze bushing in the rear with an oil wick. In the front it has a single NSK #609Z ball bearing in a retainer held in place by (4) small rivets.

My bearing was dry and binding up. The plastic race was ground up and causing the balls in the bearing to try to climb up on one another, locking the shaft and blowing the 30 amp fuse.

The hub is pressed onto the shaft. A Matco PA60 puller works perfectly to remove the hub flange.

The bearing drive plate is retained to the stator housing with (4) peen marks. To remove, simply grind away the peened areas with a carbide burr and the bearing plate pops out.

To re-install, just peen in another (4) places with a chisel or automatic center punch.
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  #2  
Old 02-13-2014, 08:28 PM
CitizenOfDreams CitizenOfDreams is offline
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You have more patience than I do! I have replaced bearings in electric motors before, but only in unique/expensive ones you couldn't pick up at the junk yard.
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  #3  
Old 02-13-2014, 08:32 PM
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Doktor Bert Doktor Bert is offline
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Got a NSK 609Z bearing for $1.29
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  #4  
Old 02-13-2014, 08:32 PM
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E34ZombieHunter E34ZombieHunter is online now
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The joys of zero rust........
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Gotta love an E34!!
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  #5  
Old 02-13-2014, 08:38 PM
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Doktor Bert Doktor Bert is offline
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Quote:
Originally Posted by CitizenOfDreams View Post
You have more patience than I do! I have replaced bearings in electric motors before, but only in unique/expensive ones you couldn't pick up at the junk yard.
I'm probably an idiot...but I can't see spending $120.00 on a made in Taiwan fan when this one is OEM BMW with great brushes and nothing more wrong than a $2.00 bearing...
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  #6  
Old 02-13-2014, 08:39 PM
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Originally Posted by E34ZombieHunter View Post
The joys of zero rust........
Rust would have made this impossible...
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  #7  
Old 02-13-2014, 08:54 PM
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Quote:
Originally Posted by Doktor Bert View Post
I'm probably an idiot...but I can't see spending $120.00 on a made in Taiwan fan when this one is OEM BMW with great brushes and nothing more wrong than a $2.00 bearing...
I am the same, if it can't be fixed i go days looking for a deal. Mostly take the P/N go to amazon and add it to my wish list. Monday morning when they take 25% off of it i buy...
If you add it they see that and when you go back it will say so many% has been taken off since you first looked at it, and every monday morning they mark stuff down even more than normal.
I got hood struts, and trunk struts for 12$ a piece from Uroparts on amazon. On their site they are 19$ a piece. They will be in tomorrow if weather permits, already had plenty of late items this week.
Now if i can only find the glove box strut.
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  #8  
Old 02-19-2014, 05:37 PM
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Doktor Bert Doktor Bert is offline
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This was actually an easy repair.

Drilled out the rivets on the bearing retainer, installed new 609ZZ or 6092RS bearing, install new rivets, install armature, peen in place, snap fan circlips into position and you have a genuine BMW/Siemens fan for about $10.00...
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  #9  
Old 02-19-2014, 05:50 PM
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1 hour's worth of work and a $10.00 bearing....
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  #10  
Old 02-19-2014, 07:51 PM
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BMR_LVR BMR_LVR is offline
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Quote:
Originally Posted by Doktor Bert View Post
1 hour's worth of work and a $10.00 bearing....
The knowledge of how to do it ..... priceless
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  #11  
Old 02-20-2014, 08:14 AM
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The knowledge of how to do it ..... priceless
The bearing was actually only $1.23 off E-Bay but the shipping killed me...
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  #12  
Old 02-21-2014, 10:07 AM
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Doktor Bert Doktor Bert is offline
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This Siemens/BMW Fan is superior in construction to the replacements. It's super quiet and moves a lot of air, drawing only 10-12 amps, on a circuit with 30amp service.

The fan is date coded 1994...I guess 18 years isn't bad service and the HUGE carbon brushes are hardly worn at all....
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Last edited by Doktor Bert; 02-21-2014 at 10:10 AM.
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  #13  
Old 02-21-2014, 10:37 AM
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E34ZombieHunter E34ZombieHunter is online now
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I just grabbed one from the JY, maybe ill order the bearing and recondition it, i read too many bad reviews on the new ones failing early, or not working correctly. Cost me 10$
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Gotta love an E34!!
If you want to get junkyard parts remember one thing, if it was wrecked you know it was running/driving. You may not know how well, but it was.

READ THE STICKIES AT THE TOP OF THE PAGE!!

STOMP TEST

READ ME IM THE BIBLE

FAN CLUTCH

LOCKS

ANGEL EYES

Audio

E28 v. E30 v. E34
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  #14  
Old 02-21-2014, 10:44 AM
Doktor Bert's Avatar
Doktor Bert Doktor Bert is offline
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Location: Palm Springs
 
Join Date: Oct 2012
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Quote:
Originally Posted by E34ZombieHunter View Post
I just grabbed one from the JY, maybe ill order the bearing and recondition it, i read too many bad reviews on the new ones failing early, or not working correctly. Cost me 10$
I will walk you through it...

If possible, get the 6092RS bearing with rubber seals. It is superior to the metal-shielded (but not dust tight) 609ZZ...

Once you fix it you will be doing this...
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Last edited by Doktor Bert; 02-21-2014 at 11:19 AM.
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  #15  
Old 02-22-2014, 02:51 PM
Mr._Graybeard Mr._Graybeard is offline
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Quote:
Originally Posted by Doktor Bert View Post
This Siemens/BMW Fan is superior in construction to the replacements. It's super quiet and moves a lot of air, drawing only 10-12 amps, on a circuit with 30amp service.

The fan is date coded 1994...I guess 18 years isn't bad service and the HUGE carbon brushes are hardly worn at all....
I've noticed other Siemens motors with massive brushes, particularly the blower motor for an MB W123 hvac system. The Bosch blower motor looks like a piece of junk in comparison.
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  #16  
Old 02-24-2014, 08:31 AM
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Indeed!!!!
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  #17  
Old 06-24-2014, 05:19 AM
Jrt766 Jrt766 is offline
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I had the same auxiliary fan woes, mine was a bit different. I removed the the bearing and armature as in the other posts, but found a magnet had come off and was caught up on top of the others. Also the magnet actually separated from it self, just a sliver. So I cleaner the housing surface with a rotozip grinding bit. Picked up some 5 minute epoxy and re glued it back in place. Have A/C again!! I have done this numerous times, power window motors, pump motors, and stators on motor cycles And they all stayed together with no problems. Hope this helps some out..


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