Take a old JIS screwdriver and put it on the screw as if to try and loosen it, but do not turn. Then hit end of screw driver sharply, firmly and straight with a "good" whack with a hammer. Next take your good JIS screw driver to loosen the screw. This method has worked many times on stubborn screws without the risk of messing up the screw to make removable even more difficult.
Works as advertised. Salesman gave me a small tube as a sample and I've used it with good results on stubborn screw heads to prevent the screwdriver from slipping off.You can also try some of this stuff to increase the grip on the screw.
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The battery operated impact driver is a great tool. I have several times thought of buying one but have yet to pick one up. What always stops me is that I have a hand impact driver that has always worked perfectly.The 3 JIS screws that hold the right mirror on are to tight to remove with just a regular JIS screwdriver so I have been considering buying a battery operated impact driver, just Wondering if you folks have any helpful advice about trying that ?
i would definitely use a impact tool adjustable. But first I would try adjusting a portable drill and set the tension in reverse like its a impact tool. thats a little screw and should be enough. Maybe a little blow dryer heat. good luckThe 3 JIS screws that hold the right mirror on are to tight to remove with just a regular JIS screwdriver so I have been considering buying a battery operated impact driver, just Wondering if you folks have any helpful advice about trying that ?
I replaced mine with allen head bolts. One nice thing is that the wrench holds the screw when re-installing.Use a manual impact for those. I should add that you will need a 1/4" drive JIS bit. Use adapters down to 1/4 drive with a 1/4 socket and a JIS bit. The best screws for mirrors are OEM ones using a correct bit when installing and removing.
I bought that same kit (refurbished) shortly after Waldo posted it and have used it with good results over the yrs.Years ago Waldo recommended a Makita brand rechargable impact driver for small to medium hardware. I had a rear caliper pad retention bolt suck that PB Blaster, Keytone and ATF, and even Kroil would not loosen. I tried all the other tricks and even my manual impact with BFH but staying within limits less than what would break the bolt, all failed. I got the little Makita and thought it would not work, but after about two minutes of zapping that bolt it started to spin out. The same kit is no longer marketed so far as I know, but they work.
Cycledude, what ever you do, one good tip is to dip your JIS bit into valve grinding compound and then tap it into the screw head before torquing.