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Old 26-08-19, 04:07 PM   #41
LukeZS96
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If the rest of the bolts came out easy and you have access to a small air grinder or can get access with a hacksaw possibly cut slots in the bolts and use a flathead screwdriver or even an impact driver with a flat head bit to remove the bolts?
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Old 26-08-19, 06:57 PM   #42
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The fix for that sort of thing I see in car shows, is to weld a bolt onto the difficult part, then undo the bolt.

No idea if that'd be any good for you though ...
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Old 26-08-19, 07:51 PM   #43
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I remembered I had a very obscure Nut extractor set, I purchased it years back for removing a locking wheel nut but it turned out it was not suitable, so I promptly "put it away" and forgot about it.

When I had remembered, then found it again I hammered the correct size on the bolt and used a normal socket to remove the bolt from the car

Anyway, got really far into the rebuild to find the pistons and rods are good, removed one piston and went to install the forged ones I have, to find they are 85mm pistons, not 84.45mm as were sold to me (84.45 is std size, in case anyone needed clarification). Upshot is they don't fit unless I re-bore!

cleaned the Mahle pistons up and refitted for now, then ran out of light so tidied up for the night!

So now I have a set of 85mm Wossner forged pistons on PEC rods, that I can't fit to my car... Will have to think of my next move over the next few days.
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Old 26-08-19, 09:41 PM   #44
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At a loss as to why hex socket head shoulder bolts have been used. They are hardened bolts and would need grinding. I would go for a rebore if possible.
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Old 28-08-19, 09:41 PM   #45
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Good to see progress.

The TF that donated it's subframes to my F came from near Bordon.
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