Topic: CB550 Left Case Cover Screws Seized Solid

[uncle_fester]

Looking for some ideas here....

My shifter lever has a slow oil leak to it, and I want to replace the seal. The left case cover has four phillips/JIS M6 screws. All four are seized up solid. I tried drilling out the top two and working a reverse drill bit/extractor on them with no luck. They're in a position where I can't get a tool on them. Not sure what to do at this point. Any ideas for getting these off? I'm afraid I might have to live with the slow leak. 

[Darren Jakal]

Prolly need to drill the head of the fastener right off. This is what I did.

With the screw heads off (right off with no flange left to hold the case on) then the case can be removed. After that what's left of the screw is easily removed. Worked in my situation.

good luck, dj

[uncle_fester]

Prolly need to drill the head of the fastener right off. This is what I did.

With the screw heads off (right off with no flange left to hold the case on) then the case can be removed. After that what's left of the screw is easily removed. Worked in my situation.

good luck, dj

Okay. I was kind of wondering about that. So, there's there's plenty of screw left to grab onto with the cover off?

[kaptainkid1]

You need a inpact screwdriver when taking those philp heads off. Maybe it will still work if try that first?

[Jerry Rxman Griffin aka MuthaF'er]

+1 then install allen head bolts.

[my name is nobody]

might want to remove the footpeg as well, gives you a little openness and allows
more wiggle room when working the cover out.

[uncle_fester]

Thanks, guys. Got the top two out with some muscle and a drill. Unfortunately, the drill scraped part of the cover on the top left, but it was not beauty queen to begin with.

Taking a break. Should be able to wrap this up soon.

[Bankerdanny]

You need to invest in a manual impact driver, the kind that works with a hammer. I haven't run across a screw yet in a SOHC4 case that it wouldn't loosen. And as a bonus the action of hitting it with a hammer drives the bit into the screw head helping to keep it from stripping out.

[uncle_fester]

You need to invest in a manual impact driver, the kind that works with a hammer. I haven't run across a screw yet in a SOHC4 case that it wouldn't loosen. And as a bonus the action of hitting it with a hammer drives the bit into the screw head helping to keep it from stripping out.

That sounds good. I hate tough screws. Is it different from a normal impact driver with a screw bit? I have a 1/2" Dewalt impact I've gotten some good use out of over the past several years. It's big, though.

[Bankerdanny]

I don't like the electric impacts, they still rely on muscle strength to push the bit into the screw head and the vibration caused by the impact action makes the bit jump. They are fine for bolts or even allen heads, but not in my opinion screws.

The hammer type uses the force of the hammer. Usually one or two good whacks will loosen the screw.

https://www.harborfreight.com/impact-screwdriver-set-with-case-37530.html

[uncle_fester]

WOO HOO! I got them all drill out and the cover off. The screws actually came out really easy. Now time to do some serious cleaning then off to the hardware store for new screws.

Thanks for all the help. 

[Airborne 82nd]

Like Banker said the hammer works better plus you can get the longer shanks for those hard to reach . If you have screwed the head up to much you may have to shave them off I use a dremel.