dallasf wrote:So I guess do I just insert the pushrod in as per the above image and I am good to go?

Laitch wrote:

dallasf wrote:So I guess do I just insert the pushrod in as per the above image and I am good to go?

Hey, you're definitely not good to go. 

Also, using a diagram depicting a K100 assembly rather than a K75 assembly when working on a K100 willl likely be less confusing for everybody.

You've got to find the clutch bearing which undoubtedly has rolled away from you during your frolics. In your photo, you seem to be staring at bearing #10 and its circlip #11 in BMW's transmission drive shaft diagram below. When you find the bearing that belongs inside the piston cup, oil it with gear oil then put it on the push rod with its open side facing inward so it can more easily pick up lubrication from the transmission. If you can't find it, order the one-piece piston assembly and use it instead following the suggestion in the parts fiche.


I wouldn't have considered installing a K75 pushrod—if it looked like the one in your diagram—into a transmission coupled to a K100 engine in the first place. These clutch pushrods aren't specific to the transmissions; they're specific to the clutch packs of the engines. K75's differ from all the others. All the others—K1002V, K1004V and K1100—share the same clutch pushrod and clutch pack designs. Perhaps I'm just not as adventurous as you.   I wonder if its use resulted in performance issues.

dallasf wrote:As you can see here, there are two different types of pushrod for 75 and 100, the 75 can be pulled from the front or the back.

Based on your above image 10, 11 and 12 are all there and you can see these in the image of my transmission, I have not taken any of that out. 

Laitch wrote:

dallasf wrote:As you can see here, there are two different types of pushrod for 75 and 100, the 75 can be pulled from the front or the back.

Based on your above image 10, 11 and 12 are all there and you can see these in the image of my transmission, I have not taken any of that out. 

I don't see what you're seeing there. As far as I know, and from the link you supplied—disregarding the line drawing, there's only one type of K75 clutch pushrod and it is installed and removed from the front of the transmission. This is it.
 
If there is another type, i hope somebody who has used it in a K75 chimes in.

If this were my project, instead of gazing at it, I would be taking out the clutch bearing to verify that it is neither deformed nor seized and that its component parts are oriented correctly before I installed the spring and boot. If everything were OK, it would be good to go.

dallasf wrote:Hey K100 has the thrust bearing on the rod, K75 doesn't.

Laitch wrote:

dallasf wrote:Hey K100 has the thrust bearing on the rod, K75 doesn't.

RicK G wrote:

Laitch wrote:

dallasf wrote:Hey K100 has the thrust bearing on the rod, K75 doesn't.

No it doesn't on both the K100 and K75 the thrust bearing is not part of the pushrod. The K75 has a small mushroom head at the diaphragm spring end and it is not compatible with the K100 clutch. The K75 pushrod must be put into the centre of the main shaft before mounting the transmission where the K100 pushrod can be inserted through the rear of the main shaft followed by the thrust bearing and rubber boot and spring.