Gudgeon pin help
Posted: Fri Jan 10, 2020 11:18 am
Hello,
I'm rather embarrassed to ask this question but here goes...
Inspired by the tales of building a bike from a pile of different bits, I've decided to try and finish stripping down a G80 bottom end I acquired 20+ years ago, specifically, to remove the wire wound piston before getting the crankcases apart and seeing how good or bad what is inside is.
The gudgeon pin is part of the way out, although I can't remember if I started removing it and got stuck or if it was like that when I got the engine.
Over the Christmas holiday I thought I would try and press it out using a long bolt and various sleeves and spacers plus a blow torch. I got it to be about 3/4 inch out one side of the piston but no further. In a spirit of "trying" to do things properly, I bought a gudgeon pin extractor tool from ebay and set to again with plenty of heat. Unfortunately, it was still stuck so I thought I'd apply some leverage to the tommy bar on the extractor. Here's the embarrassing bit , I snapped the end off of the extractor tool and the pin still won't move any further!
I may be able to find someone to turn the end of the tool down so it can be used again but, meanwhile, does anyone have any ideas on how to get the pin out, please? I really don't want to destroy any of the parts but am not sure what else to try.
Many thanks
Mark
I'm rather embarrassed to ask this question but here goes...
Inspired by the tales of building a bike from a pile of different bits, I've decided to try and finish stripping down a G80 bottom end I acquired 20+ years ago, specifically, to remove the wire wound piston before getting the crankcases apart and seeing how good or bad what is inside is.
The gudgeon pin is part of the way out, although I can't remember if I started removing it and got stuck or if it was like that when I got the engine.
Over the Christmas holiday I thought I would try and press it out using a long bolt and various sleeves and spacers plus a blow torch. I got it to be about 3/4 inch out one side of the piston but no further. In a spirit of "trying" to do things properly, I bought a gudgeon pin extractor tool from ebay and set to again with plenty of heat. Unfortunately, it was still stuck so I thought I'd apply some leverage to the tommy bar on the extractor. Here's the embarrassing bit , I snapped the end off of the extractor tool and the pin still won't move any further!
I may be able to find someone to turn the end of the tool down so it can be used again but, meanwhile, does anyone have any ideas on how to get the pin out, please? I really don't want to destroy any of the parts but am not sure what else to try.
Many thanks
Mark