SOHC.co.uk Forums > CB500/550

Best method to undo/fasten 6mm nuts at exhaust pipe joints

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McCabe-Thiele (Ted):
My approach would be overnight soak with penetrating oil - then use a cordless impact driver.

deltarider:
Maybe there's some misunderstanding. Rust is not in play. Not at all. The studs are 46 years old and my only concern is that when I turn the nuts - BTW, I see no need for another tool than just a socketwrench by hand - the studs will not also move. This because on reinstalling them, there's a risk the threads will damage. This is what happened the last time with some of them. So it's just whether it should be done cold or hot and if it is any use to replace the nuts by flange nuts.

Johnwebley:
Basically your hoping the friction between the nut and the stud is less than the stud and the head?

My original suggestion of penetrating oil, and time to let it work is  my best plan,

If any of the studs do come out,

Remove the nut, using the method you prefer,

Then using 2 nuts locked together screw back in the head,

Not sure if I would use threadlock,

What do others think?


Then assemble as normal, using coppaslip on the thread, hopefully to cure future problems.

Sent from my SM-A750FN using Tapatalk

deltarider:
Thanks, John. I have done all that in the past. I guess the threads eventually become too old. When the worst comes to the worst, it's good to to know Honda4.nl has this on offer: https://honda4parts.nl/product_info.php?products_id=2378&language=en&ceid=4c92518617e2495bc6f4ea7dcaddf20e

McCabe-Thiele (Ted):
My 400 came with SS studs already fitted - when I removed the steel nuts they all stayed in place - might be that the previous owner put some locktite on the threads when he fitted the studs.

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