quote:
Originally posted by K.Wilson
Buzz,
It looks to me like who ever installed the rear end used the original Jag bolts that have a 60 degree shoulder that matches up to the 60 degree countersink on the Jag subframe. If your Unique frame was not modified with the same countersink it is no wonder they came loose and broke. The tapered shoulder on the bolt was mateing with the sharp edge of the hole so there was almost no mateing surface area between the bolt and the frame hole. Can you see how damaged the holes in the frame are? Do they look like you can clean them up with a die grinder and get a good flat surface for the bolt head?
If it were mine I would try to remove the broken bolts by a low tech method first. I would try to grind a screw driver slot in the top of the bolt with a die grinder and a cut-off wheel or a Dremmel tool with a cut-off wheel, then take a large screw driver and try to back it out. If that did not work you will most likley need a carbide drill bit to drill the bolt for an EZOUT extractor. I think those bolts will be so hard that a regular drill bit will not cut them.
Don't get too concerned if you cut into the differential case some in the process of cutting a slot for a screw driver, there is plenty of material there for surface contact and you will have to run a tap down the hole to clean-up the threads any way. You may want to start soaking the bolts with penetrating oil now to help in the process. Actually, the threads do not appear to be damaged in the photo. This could be an inexpensive fix.
Hope this helps, if you need to discuss this by phone PM me and we can set up a time.
Keith