Question for Mr Wilks...

Ducklakeview

Elite
 Merseyside
Can you tell me the size and type of bit required for the 108's bolts? Thinking of backing mine off and back up before I get them done, to reduce the possibility of damage.

Thanks

Mike
 
It's an 8mm 12 point spline drive.

I strongly suggest you get a decent bit and one that can be used on a socket set, torque wrench, etc. (directly or via adapter)
 
cj10jeeper said:
It's an 8mm 12 point spline drive.

I strongly suggest you get a decent bit and one that can be used on a socket set, torque wrench, etc. (directly or via adapter)
And be prepared for the potential frustration http://www.z4-forum.com/forum/viewtopic.php?f=3&t=79502&p=1170980
 
What I will add to the above after parting 15-20 sets of these is don't buy cheap bits & try to get a "feel" when the bolt won't move & move on to one opposite on the wheel face . Very often I found leaving the ones that seemingly won't budge very often do .

Other tips if you find yours difficult

I would always loosen in random star pattern as opposed to round the clock
The ones around the valve are usually the tightest :?
Forget all notions of soaking with penetrating oil or using heat/cold to loosen , ive tried them all with zero effect
What I found worked best is a 50mm long 12 spline that I "strike" with a lump hammer 2/3 times each bolt to break the seal
Then have a different bit to do the loosen & remove immediately after striking

Finally If you should get a snapped head I found a easier way to remove them than drilling out , with centre removed I grind 2 flat sides onto the remaining stump & use tiny spanners to turn the thread out :thumbsup:
 
mr wilks said:
What I will add to the above after parting 15-20 sets of these is don't buy cheap bits & try to get a "feel" when the bolt won't move & move on to one opposite on the wheel face . Very often I found leaving the ones that seemingly won't budge very often do .

Other tips if you find yours difficult

I would always loosen in random star pattern as opposed to round the clock
The ones around the valve are usually the tightest :?
Forget all notions of soaking with penetrating oil or using heat/cold to loosen , ive tried them all with zero effect
What I found worked best is a 50mm long 12 spline that I "strike" with a lump hammer 2/3 times each bolt to break the seal
Then have a different bit to do the loosen & remove immediately after striking

Finally If you should get a snapped head I found a easier way to remove them than drilling out , with centre removed I grind 2 flat sides onto the remaining stump & use tiny spanners to turn the thread out :thumbsup:

Or do as I do and just spin them out with an airgun. I find it removes all the faffing around and risk of twisting the bit on a ratchet or T bar. High quality tools are the key to this...

Totally agree re all your comments about removing snapped studs and not wasting time on penetrating oil, heat/cold, etc.
 
Back
Top Bottom