Did some disassembly on my BMW.
![[Image: 29vjf44.jpg]](http://i58.tinypic.com/29vjf44.jpg)
The initial reason was to replace the pushrod seals. But the last series of airheads suffer from some poor quality.
So I checked the weak points such as pitted cam followers and the "pin of horror"
One cam follower was a little bit worn (no pitting) so I will replace it.
But the "pin of horror" is still in place. And this are good news. This part got its name in the German airhead forum because if it is missing it can cause a complete enginge breakdown or at least a complicated strip down to reinstall it.
This pin fixes the position of the front bearing of the crankshaft. It is caulked in the housing. But this caulking was done more or less carefully so it can fall out and you might find it in the oil pan.....
Often nothing happens but the front bearing can move and then the complete oil circuit gets blocked with all consequences :eek
The initial reason was to replace the pushrod seals. But the last series of airheads suffer from some poor quality.
So I checked the weak points such as pitted cam followers and the "pin of horror"
One cam follower was a little bit worn (no pitting) so I will replace it.
But the "pin of horror" is still in place. And this are good news. This part got its name in the German airhead forum because if it is missing it can cause a complete enginge breakdown or at least a complicated strip down to reinstall it.
This pin fixes the position of the front bearing of the crankshaft. It is caulked in the housing. But this caulking was done more or less carefully so it can fall out and you might find it in the oil pan.....
Often nothing happens but the front bearing can move and then the complete oil circuit gets blocked with all consequences :eek
Guenter