cracks in rear sprocket drum?

Hi all.

I managed to strips 3 of the 5 bolts attaching the rear sprocket to the rear sprocket drum. The nuts are turning loose on the bolts and cannot be removed. Stupidly enough, I smashed onto one of the nuts, trying to get it off. Didn't work. Then I noticed some cracks in the alu drum house, more specifically connections to the bearing house; see on attached pics. I'm afraid this could be the result of the smashing. Don't know if they where there before.
Is there sbdy who can check on his rear-sprocket drum to see if these cracks are genuinly present and thus result of normal machining?

What do ya think gentlemen, can I remount & drive with this sprocket-drum, or will it be torn to pieces and eventuallly kill me?

Tx, Phil

the sprocket & drum; red circles indicate where cracks appear:
http://i265.photobucket.com/albums/i.../DSCN2953e.jpg

cracks close-ups:
http://i265.photobucket.com/albums/i.../DSCN2948e.jpg
http://i265.photobucket.com/albums/i.../DSCN2949e.jpg
http://i265.photobucket.com/albums/i.../DSCN2950e.jpg
http://i265.photobucket.com/albums/i.../DSCN2951e.jpg
http://i265.photobucket.com/albums/i.../DSCN2952e.jpg

[TSM]

looks like casting defects to me, not 100% sure, i dont think its much of a problem though
if the bolts are just spining you will need to push the bolt part from the back of the hub so it stops spinning as you undo the nut

evilbay usa 300450743675
or
http://shop.ebay.com/i.html?Model=SV...h+drive&_rdc=1

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[rictus01]

they do look like casting marks, but without seeing first hand I wouldn't like to diagnose from those images, and as you don't have your location in your profile, not much chance of anyone popping over to have a look for you either .

Originally Posted by philbond07

Hi all.


Tx, Phil

from these 2 things i thought across the pond
but he could just be polite

[yorkie_chris]

Tip for you: Next time a bolt is spinning freely, look at the back of it and find out why BEFORE you smash f*ck out of it with a hammer.

QUOTE=davepreston;2335808]evilbay usa 300450743675
or
http://shop.ebay.com/i.html?Model=SV...h+drive&_rdc=1

peice of mind
priceless[/QUOTE]

Hey dave haha yes you're right, great link; this will surely be option when I cannot be reassured finally. Only problem is getting the stuff shipped to Belgium.

Right, profile updated. I'm getting old.

Originally Posted by rictus01

they do look like casting marks, but without seeing first hand I wouldn't like to diagnose from those images, and as you don't have your location in your profile, not much chance of anyone popping over to have a look for you either .

Originally Posted by TSM

looks like casting defects to me, not 100% sure, i dont think its much of a problem though
if the bolts are just spining you will need to push the bolt part from the back of the hub so it stops spinning as you undo the nut

I can't see how this should help me. The bolts/nuts are spinning simply because they are stripped. This of course has nothing to do with the special shaped bolt head not being housed in proper location.

Why the bolts/nuts are stripped? Cause I torqued them to 60 Nm as the manual prescribes, which is much too high for this type of bolt. Max. for 8.8 M10 is like 47 Nm. Only found this out post-damage of course.

Appreciate your reaction TSM. Not sure though if the cracks are casting defects or induced by hooliganism.
If I can find another case of oem-cracks, say on one of yr sv's, then it would look like just cast-defects.

Originally Posted by yorkie_chris

Tip for you: Next time a bolt is spinning freely, look at the back of it and find out why BEFORE you smash f*ck out of it with a hammer.

There was nothing to be seen at back of bolts I guess.
Just wanted to try get them out before taking a grinder; have no access to a nut-cracker.

But what do you think of the sprocket drum "cracks"?

Is there someone of you gentlemen who is able to check out yr sprocket drum and see if these "cracks" are moreorless genuine?
Would be great moment to clean-up that rear-wheel.