An potentially expensive mistake....
Team Owner
Joined: May 2004
Posts: 31,333
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From: Philly PA
thats a good thing that the damage wasnt more severe.
With the small bolt being stripped be very careful with the measurement of the new bolt length you might get a longer bolt but it will bottom out if its too long.
Note use washers to get the length correct (if you use a longer bolt) and also that bolt goes into the block so you may have to put a helicoil into the small bolt hole and then make sure to tighten it last and not over tighten it.
BTDT
With the small bolt being stripped be very careful with the measurement of the new bolt length you might get a longer bolt but it will bottom out if its too long.
Note use washers to get the length correct (if you use a longer bolt) and also that bolt goes into the block so you may have to put a helicoil into the small bolt hole and then make sure to tighten it last and not over tighten it.
BTDT
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From: Buckeye, AZ
Right, Stan. I mentioned to Rob to probe the bolt hole. It looks like there is enough good thread and depth for a longer bolt w/o bottoming and that bolt doesn't need to be torqued down all that tight. There are two larger diameter bolts that anchor the cassette.
Drifting
Joined: Jun 2006
Posts: 2,708
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From: Indianapolis Area
I’m glad to hear you dodge the bullet… nothing major.
There must have been some loose bolts prior to the incident. I still don't get how the ALT pulley bolt backed out. I just figured it had snapped off.
The cassette bolt I would have guessed was missing (since there are two side by side where one would probably do… typical German engineering). It’s the pivot bolt that has all the meat.
I think I’m going to try real hard to get my belly pan back on because I’m thinking it offers up at least a little bit of protection. I think it’s in the attic somewhere.
There must have been some loose bolts prior to the incident. I still don't get how the ALT pulley bolt backed out. I just figured it had snapped off.
The cassette bolt I would have guessed was missing (since there are two side by side where one would probably do… typical German engineering). It’s the pivot bolt that has all the meat.
I think I’m going to try real hard to get my belly pan back on because I’m thinking it offers up at least a little bit of protection. I think it’s in the attic somewhere.
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From: Buckeye, AZ
Kurt:
I don't understand how the alternator nut and pulley came off either without damaging the shaft. The one missing bolt could have been tight - it stripped threads out of the block. The others could have been tight beforehand too - they stretched. All in all, rather amazing, however.
I don't understand how the alternator nut and pulley came off either without damaging the shaft. The one missing bolt could have been tight - it stripped threads out of the block. The others could have been tight beforehand too - they stretched. All in all, rather amazing, however.
Drifting
Joined: Jun 2006
Posts: 2,708
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From: Indianapolis Area
That makes sense on the cassette… a huge impulse/spike of force. One bolt strips hole, one stretches and one (or two get bent).
A bolt backing out on a pulley with woodruff key is beyond my imagination.
That makes sense on the cassette… a huge impulse/spike of force. One bolt strips hole, one stretches and one (or two get bent). A bolt backing out on a pulley with woodruff key is beyond my imagination.
I won a set of these in Hell a few years back, just never got around to installing them. I wonder it they would a helped a little in this case… hard telling.
http://www.928motorsports.com/parts/chinplate.php
A bolt backing out on a pulley with woodruff key is beyond my imagination.
That makes sense on the cassette… a huge impulse/spike of force. One bolt strips hole, one stretches and one (or two get bent). A bolt backing out on a pulley with woodruff key is beyond my imagination.
I won a set of these in Hell a few years back, just never got around to installing them. I wonder it they would a helped a little in this case… hard telling.
http://www.928motorsports.com/parts/chinplate.php
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From: Oman
Rob,
You are not the first 928 owner to do something a bit twatish! Sounds like a relatively light incident-anything less than $1k of attrition is good news if you do not manage to keep it between the hedges. This is just a flesh wound.
I can thoroughly recommend the aluminium pans and as Wally said in his post you need to transfer the stacks as they do not come on the ally pans. I can also highly recommend the bash plates that Carl sells. whether they would have saved your bacon in this instance I do not know given the angle of attack. The bash plates are optimal over speed bumps and sharp dips in the road [as I found out recently]. The ally pan also provides quite a lot of protection and a big hammer will knock it back in shape [I beached my rear pan recently trying to get a shaded parking spot under a tree].
Unfortunately my current GTS did not have the original plastic cover fitted so I do not have the vent stacks fitted on my belly pan. Not sure what they are actually doing - I presume they help extract hot air from specific locations- I have not seen any detriment but then....?
Get well soon
Best wishes
Fred R
[QUOTE=rligeti;7591379]I took the 928 out today to get the fluids moving and about half way though my 3 mile loop, the rains came.... I wanted to get back to shelter since she just got a buff and polish and I was on the go pedal a little too heavy, lost the *** end in a corner, went to correct, flipped it the other way and can over a curb......
From what I can tell, at the very least it's a belly pan, new alternator pulley and belt, possibly alternator mount, alignment and I'm not sure what else yet.
Cosmetically, no damage, emotionally, it's another story...
I feel like i'm gonna barf...
You are not the first 928 owner to do something a bit twatish! Sounds like a relatively light incident-anything less than $1k of attrition is good news if you do not manage to keep it between the hedges. This is just a flesh wound.
I can thoroughly recommend the aluminium pans and as Wally said in his post you need to transfer the stacks as they do not come on the ally pans. I can also highly recommend the bash plates that Carl sells. whether they would have saved your bacon in this instance I do not know given the angle of attack. The bash plates are optimal over speed bumps and sharp dips in the road [as I found out recently]. The ally pan also provides quite a lot of protection and a big hammer will knock it back in shape [I beached my rear pan recently trying to get a shaded parking spot under a tree].
Unfortunately my current GTS did not have the original plastic cover fitted so I do not have the vent stacks fitted on my belly pan. Not sure what they are actually doing - I presume they help extract hot air from specific locations- I have not seen any detriment but then....?
Get well soon
Best wishes
Fred R
[QUOTE=rligeti;7591379]I took the 928 out today to get the fluids moving and about half way though my 3 mile loop, the rains came.... I wanted to get back to shelter since she just got a buff and polish and I was on the go pedal a little too heavy, lost the *** end in a corner, went to correct, flipped it the other way and can over a curb......
From what I can tell, at the very least it's a belly pan, new alternator pulley and belt, possibly alternator mount, alignment and I'm not sure what else yet.
Cosmetically, no damage, emotionally, it's another story...
I feel like i'm gonna barf...
