I've posted this on the FB group, but I thought I'd ask here too...
I'm having major hassles at the moment as I needed to replace the gasket at the bottom of the cat pipe on my FZ6 (2006) and decided I might as well replace the header bolts and studs since they were getting seriously manky.
Unfortunately, despite liberal spraying with Plusgas, tapping with a hammer and wedging two nuts together, I still can't get them to budge.
I went to B&Q and got myself a blow torch and some freeze spray, I've used more Plusgas, I've used the blow torch, I've used the freeze spray, but even with two nuts wedged together, the stud won't shift and I just end up unscrewing both nuts at the same time!
(And, yes, I cleaned the Plusgas off the stud before I put the nuts on!)
I've used a wire brush on a Dremel to clear as much rust off the base of the studs as I can and sprayed on more Plusgas, maybe they'll shift tomorrow...
Question: How long should I apply heat from the blowtorch? I've tried 30 seconds and then a minute, but I'm not sure how much effect it's having.
Anyone got any recommendations for how long I should use the torch without worrying about melting parts?