The story of how I did assemble the fan.
So, I remind you of the beginning of the story)
I didn't disassemble the first fan correctly, and now I can't put it back together because the impeller didn't come off.
I broke the second fan because the impeller did not come off.
The third fan already had a broken impeller, but it does not come off.
The fourth fan worked, but the bearing needs to be replaced. To do this, you need to remove the impeller... )
So, with determination, I unscrewed the nut... and the impeller came off with absolutely no effort! Just like most videos on YouTube! )) I don't know why I was unlucky three times, but the fourth time everything turned out well! ) Finally, the fan is successfully completely disassembled!

There was almost no corrosion inside, only dust and dirt.

The bearing is riveted in the top cover. We drill four rivets and remove the bearing.

Next, traditionally - cleaning, washing, sanding, painting.

The magnets hold very well on the case, so I did not remove them. "Brushes" are also in good condition, not worn.

By the way, compared to an early similar fan, there are not significant differences - the magnets are fixed differently, and there are two capacitors instead of one.

On the early wiring, the connector has flat contacts, and on the late wiring - with round ones.

On the early fan, the wiring is much shorter, since the connector is fixed directly on the fan housing.

There was no point in removing the rotor from the axis, I just cleaned it.


I painted the impeller because it was very worn. The blades on it are not located symmetrically. I read somewhere that this was done to reduce the noise from them. But I'm not sure if that's really the case.

By the way, does anyone know why the letters of the English alphabet are drawn on it in a circle?

The impeller is simply tightly seated on the axis with a bushing, and on top is locked with a washer under the nut. I do not understand why it is not removed on the first fan. Is the sleeve corrosion really that bad?


The aluminum body is sandblasted and painted. There is also an unclear point about it - in the photo you can see a cutout on the rear part of the rim of the case. I don't understand what he is for either.

There is a cutout on top - on the E30, nothing prevents him there. Is it possible that on other models something interferes or rests there...

I bought a new resistor - a similar one, produced by GM. With the GM part number (94812213), it is three times cheaper than the exact same Bosch resistor (3134503020), or four times cheaper than the same Bosch one ordered with the original BMW part number (17401373177).

The design and resistance (0.6 Ohm) are exactly the same. The only difference is one mounting hole instead of two. If desired, you can drill, but it is fixed perfectly anyway. I don't think it's worth paying more! ;)


I drilled holes for rivets with a diameter of 3 mm in the lid.

New bearing SKF 6001. They say that there are many Chinese fakes, so I ordered a bearing of European manufacture - France.


The old factory bearing was a NSK 6001. It didn't seize, but it was already completely dry, so it was very noisy.

So, tightly insert the bearing into the cover.

But we rivet with four 3x8 mm rivets. The rivets should not protrude too much so as not to catch the rotor and the impeller.


Lubricate the axis and bushing with grease, treat all contacts with a special spray, and wash the remains with anti-silicone.

We install the rotor.

We install a cover with a bearing on the axle and bolts. It is important to install the cover with the right side - riveted washer to the mount. Because I messed up at first and the cover jammed the rotor... )
Another nuance - there is one hole in the engine housing - it looks like a drain. Therefore, we put the engine on the body with this hole facing down.

In such a position.

We fasten the engine with three nuts. We fix the wiring with ties in the places provided for this.

Lubricate the sleeve (so that it can be removed again later, if necessary), and install the impeller.

We fix the position of the impeller on the axis so that the locking washer falls into the grooves on the impeller. We tighten the nut - LEFT thread! Lock the nut with one "eye" of the washer.

We install and connect a resistor to the wiring terminals. We fix the wiring with ties in the places provided for this.


We snap the connector body onto the foam.

The bracket on the fan housing is used to fix the connector only on the early wiring. In this case, it is not used.

The fan is ready for installation.


Checked - works at both speeds, almost silently.
I will try to collect my other fans later. At least one. Or maybe it will be possible to collect one more from two.
Next is the capacitor.

























































































































































































































































































































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