|
|
06-21-2016, 06:27 PM | #1 |
New Member
7
Rep 27
Posts |
Throttle Actuator Shaft Stripped...
I was in the process of replacing the gears in my throttle actuator and the threads of the shaft stripped. Do you guys know of anyone who would sell the shaft only or do I need to replace the whole actuator()?
|
06-21-2016, 06:40 PM | #2 |
Brigadier General
514
Rep 3,482
Posts |
You may be able to pick up a used one. I remember seeing busted actuators in the for sale sub forum. You don't need the gears, just the shaft, right? So I'd hunt for someone with a broken one in their garage and buy it off them for cheap
__________________
2011 e90 M3 Space Grey DCT ZCP- eAs, BMW Performance, Agency Power, Macht Schnell, iND, Milltek, Volk, Challenge, Stoptech, Ohlins
BMWCCA:518970 |
Appreciate
0
|
06-21-2016, 09:09 PM | #5 |
Lieutenant General
5608
Rep 11,065
Posts |
He overtightened the nut. Buy a broken actuator to salvage the shaft, or to start the mechanical rebuild process over on. The electronic rebuild is another matter.
|
Appreciate
0
|
06-22-2016, 10:00 AM | #6 |
First Lieutenant
92
Rep 393
Posts
Drives: ///M3
Join Date: Aug 2014
Location: Toronto, #TheNorth
|
You can get a thread repair tool too and try that before shelling out for a used TA.
__________________
2009 BMW E93 6MT///M3 - SG/FR
2011 BMW E90 DCT///M3 - JB/FR (Sold) |
Appreciate
0
|
06-22-2016, 10:12 AM | #7 |
Lieutenant
146
Rep 409
Posts |
Those threads are easy to strip and the trickiest part of this service. As others said, you need a replacement, from a bad actuator. I tried to re-cut the threads and was unsuccessful.
One defense for the future: Heat up the bushing (bake in over or soak in boiling water) before you attempt reassembly. This will reduce the stress on the threads. And, make sure you have the sequence right: put the two 1/2" washers on first, then the output arm (squared off hold cut in it). Not the other way around. The washers may have a slightly larger ID than the OD of the shaft. This lets them wander around a little, which is NOT ok. They need to be as perfectly concentric (e.g.: lined up) with one another as possible. If the edge of the lowermost washer clips the edge of the bushing, torque will go way up, you will think you need to tighten more, and you will strip the threads.
__________________
Jon Maddux
coupenut.blogspot.com x5nut.blogspot.com 16 X5d | 08 M3 Sedan | 06 M Coupe | 01 M coupe | 99 M coupe |
Appreciate
0
|
06-22-2016, 06:23 PM | #9 |
Captain
336
Rep 724
Posts |
I encountered the same situation. I was able to salvage the shaft. One has to press on the ring in an alternative fashion. I used a 6" C-clamp, some plastic blocks, and a 3/8" drive socket. A very messy diagram is shown (not much of an artist). Once pressed on, I had enough thread to secure the lever and two washers. I used Loctite so as not to over torque.
I did the gear replacement as a PM and did not have any codes. Both actuators are working. Not sure how successful repairs are when codes are thrown |
Appreciate
0
|
Post Reply |
Bookmarks |
|
|