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Flywheel threads stripped?
https://www.ausmini.com/forums/viewtopic.php?f=2&t=75465		 Page 1 of 2
Author:  harry33 [ Mon Feb 13, 2012 8:16 pm ]
Post subject:  Flywheel threads stripped?
Hello,

I went to remove my flywheel this evening, but none of the three holes in the flywheel for the puller bolts have threads. I can see what looks like the remnants of some threads in the holes, so I assume they have indeed been stripped (rather than there being some other threaded holes behind the flywheel that the bolts are meant to screw into, or something like that - please correct me if this is actually the case!). Any suggestions as to what I should do about this?

Cheers,
Harry
Author:  drmini in aust [ Mon Feb 13, 2012 8:58 pm ]
Post subject: 
If it is a 2 piece flywheel, you are looking at the holes in the flywheel hub.
The threads are in the flywheel itself, behind the hub.
You need longer bolts maybe. :)
Threads are 3/8 UNF, put a bit of oil on the bolt threads.
Author:  harry33 [ Mon Feb 13, 2012 9:26 pm ]
Post subject: 
Here's a picture (sorry about the lack of focus)..
Image
I can see right through the circled holes to what I assume is the clutch plate (something solid without any holes in it, at least), and there's no thread anywhere in the holes. Am I missing something?

Cheers,
Harry
Author:  simon k [ Mon Feb 13, 2012 9:29 pm ]
Post subject: 
yep... there should be threads in those holes

bugger!

gentle(ish) taps through the starter motor hole with a piece of wood - tap tap tap, turn the flywheel, tap tap tap, turn, etc. etc.
Author:  drmini in aust [ Mon Feb 13, 2012 10:09 pm ]
Post subject: 
Get a 7/16 UNF tap, cut new threads, use 7/16" bolts.
Tapping drill size is 25/64" but if stripped now it's at least 3/8" (24/64) so is pretty close.
Author:  Convertible Mini [ Tue Feb 14, 2012 6:45 am ]
Post subject:  No Threads
And if it comes off and you intend to re use it get it Balanced or throw it away!
Author:  Mike_Byron [ Tue Feb 14, 2012 9:41 am ]
Post subject: 
If you need another flywheel I would have one you can have - you just have to come and get it - halfway between Wellington and Gulgong.

Mike
Author:  bnicho [ Tue Feb 14, 2012 11:05 am ]
Post subject: 
I had one like that. A good mate welded a nut on there and we got it off with the puller that that way. It went to scrap metal afterwards.
Author:  drmini in aust [ Tue Feb 14, 2012 11:48 am ]
Post subject: 
If you are welding nuts on there, DON'T use it afterwards.. cast iron does not like being arc welded.. :!: it will be an accident waiting to happen.
Author:  bnicho [ Tue Feb 14, 2012 11:52 am ]
Post subject: 
drmini in aust wrote:
If you are welding nuts on there, DON'T use it afterwards.. cast iron does not like being arc welded.. :!: it will be an accident waiting to happen.


Yes, we threw it in the scrap metal bin. :)
Author:  drmini in aust [ Tue Feb 14, 2012 12:02 pm ]
Post subject: 
Yeah Brett I figured you did, my comment was to warn others why.
Cast iron ain't that strong- here an over-lightened iron backplate that let go.
OK it was turbo powered... :lol:
Image
Author:  MG Rocket [ Tue Feb 14, 2012 4:41 pm ]
Post subject: 
Does the driver still have his right leg?

Image
Author:  drmini in aust [ Tue Feb 14, 2012 6:06 pm ]
Post subject: 
Yeah, lucky for him it went out the front. :lol:
Author:  harry33 [ Tue Feb 14, 2012 8:14 pm ]
Post subject: 
Bugger.. I knew it was all going too smoothly! Thanks for the suggestions for getting it off - I'll try some of them on the weekend.

Thanks for the offer Mike, but I think I'll struggle to find the time to drive up there and pick it up.

Cheers,
Harry
Author:  Mike_Byron [ Wed Feb 15, 2012 8:14 am ]
Post subject: 
I did an inventory check yesterday - I have at least eight two piece flywheels. If you know someone going past near here let me know and we can work out something in terms of a pickup.

Mike
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