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Re: Monty 247 cylinder removal

Posted: Thu Aug 30, 2018 7:09 pm
by Rod
Normal thread in other words, clockwise to tighten, anti-clockwise to loosen.

Re: Monty 247 cylinder removal

Posted: Thu Aug 30, 2018 7:53 pm
by Glen N
Ok thanks, I’ll give that a crack. Gotta love old bikes....

Re: Monty 247 cylinder removal

Posted: Wed Sep 12, 2018 7:55 pm
by Glen N
Ok tried everything now, absolutely no movement from any head bolt. Tried brass drift, heat, numerous penetration oils, impact driver, rattle gun.

I’m going to outsource the problem.

Any got any good small engine specialist north side of Brisbane?

Re: Monty 247 cylinder removal

Posted: Fri Oct 05, 2018 8:05 am
by rudge250
I swear by impact Rattle Guns. My 1/2 inch Air Gun has never let me down as a professional Mechanic. Make sure that a heavy duty impact socket attachment is used. Light weight tools do not transfer the impact energy to the offending bolts/ nuts ,erc.
using a breaker bar will often result in a broken stud. Ask me how I know !!!!!

Re: Monty 247 cylinder removal

Posted: Fri Oct 19, 2018 7:36 am
by Glen N
017B4C9B-5F6E-4FE6-AF81-DAD673E5204C.jpeg
Barrel bolt
017B4C9B-5F6E-4FE6-AF81-DAD673E5204C.jpeg (1.1 MiB) Viewed 5405 times
I can 100% confirm that an impact socket on a 1/2inch rattle gun has only helped me start the rounding process so I can start drilling out the nuts!! :oops:

This :montesa is fighting me all the way, reminds me of an old girlfriend but meaner.

Time to get the drill out I think.

Re: Monty 247 cylinder removal

Posted: Fri May 03, 2019 3:58 pm
by OlDaz
Perseverance is a good thing here, plenty of penetrene (much better than WD40 for this), hitting on top of nuts with a drift certainly helps, as does heat directed down through the access holes. You can heat with a controlled torch, then add some candlewax into the top of the nuts, then let it cool overnight and try again. I just finished my rebuild, bike was lying behind a shed for 20 something years in the weather before I got it.