• There has been a recent cluster of spammers accessing BARFer accounts and posting spam. To safeguard your account, please consider changing your password. It would be even better to take the additional step of enabling 2 Factor Authentication (2FA) on your BARF account. Read more here.

Welding a hole in my crankcase.

Looks fixable, but only with the motor out and apart. Too tough to get clean and the weld will need to be finished and cleaned from the inside too.

Highly suggest bolting the cases back together once all the guts are out before welding to keep the welded half from warping.
 
I'll buy the used motor.

JB weld that sucker and drive it. Even if it flaked metal into the crank it usually falls to the bottom and gets sucked into the sump and stays there. Downside? Slight chance your motor self destructs. Upside? It probably lasts 50k more miles.
 
I did a little experiment today at lunchtime.

I punched a hole in an old GSXR oil pan with an 8mm bolt.

The cast aluminum shattered. There were three distinct cracks radiating out from the hole that were not visible from the outside.
 

Attachments

  • IMG_3181.jpg
    IMG_3181.jpg
    135.3 KB · Views: 11
  • IMG_3182.jpg
    IMG_3182.jpg
    162.2 KB · Views: 13
ALANRIDER7 said:
I did a little experiment today at lunchtime.

I punched a hole in an old GSXR oil pan with an 8mm bolt.

The cast aluminum shattered. There were three distinct cracks radiating out from the hole that were not visible from the outside.
Click to expand...

Look this is the garage. Nobody wants the proper way to do things. This is the half ass patch forum. Get with it, pal..
 
There are many fine welders in the Bay Area and beyond- (santa cruz).
That can be welded no sweat..

For those hinting at explosions and the like-no.That's not going to happen..

An experienced welder versed in cast aluminum case repair does no just buzz a pass over the hole.. An experienced welder would do maybe a half a drop at a time,working from outside to inside-letting each dab cool before adding the next. Surrounding the area with welders putty to absorb heat also.

Cleanliness is the real key here-having the motor out of the bike is the smaller price to pay than a full tear down and new cases.
 
ALANRIDER7 said:
I did a little experiment today at lunchtime.

I punched a hole in an old GSXR oil pan with an 8mm bolt.

The cast aluminum shattered. There were three distinct cracks radiating out from the hole that were not visible from the outside.
Click to expand...

cool.
 
Weld it.
BUT.....
I'm a little disappointed SeaFoam® hasn't made it into the discussion yet.

:loco
 
Devcon 10610 Aluminum putty. JB is crap. The devcon you can machine, drill, tap, is MIL spec rated, immersion tested, etc, etc.. Have made many excellent repairs on motos with this stuff. Used to build up 2-stroke cases with it and then machine them down and match them. Repair main bearings that spun. All kinds of stuff. Any epoxy that can stand up to a RS125 case for a few seasons is damn good. Would not use it in a structural application I would weld there. But elsewhere works great. Folks really got kick their JB habit around here. I did mention that stuff is garbage, right?
 
JimE said:
Devcon 10610 Aluminum putty. JB is crap. The devcon you can machine, drill, tap, is MIL spec rated, immersion tested, etc, etc.. Have made many excellent repairs on motos with this stuff. Used to build up 2-stroke cases with it and then machine them down and match them. Repair main bearings that spun. All kinds of stuff. Any epoxy that can stand up to a RS125 case for a few seasons is damn good. Would not use it in a structural application I would weld there. But elsewhere works great. Folks really got kick their JB habit around here. I did mention that stuff is garbage, right?
Click to expand...

Only works if you clean the cases with seafoam first!
 
krackajak said:
welding on tanks (tank being anything enclosed that could hold hold liquid) is generally a no no because a spark can literally turn it into a bomb.
Click to expand...

In my experience, it will flash but not explode. Which, even with welding glasses on, will cause a loss of eyebrows and a sunburn like condition on the exposed face. Ask me how I know.

Of course, my intent was not to do a solid repair. And it was certainly not a clean weld.
 
You must log in or register to reply here.
Back
Top