Cases gouged below crank

[SavageBanshee]

Hey ya'll

i am doing an overhaul on a 96 banshee i purchased.

The banshee blew and busted something good. The piston rod got destroyed where it attached to the crank. Upon inspection of the lower case i notice that one of the trenches, where the piston rod rotates, the one where the crank came apart is scared and has a nasty pit, obliviously the broken rod did this. It is like a couple millimiters deep. I taked to this one guy whos pretty firmiliar with 2 stroke engines and he told me to get it filled. I was wondering if i can do this with JB weld? If not is thier some other epoxy? I am hesitant because this area has potential for ware and i dunno how JB weld wares off and if it will come apart in chuncks or something and mess up another crank. I am assuming that it is vital to correct this gouge.

Also on the top half of the case thiere is some ware where the rods fly by... does this need to be corrected and can i do this by modling some expoy? like JB weld?

Thnx boys.

 

Pics Lovin i can't upload my 350kb worth of images when i have a 750 limit on this site.

 

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Edited September 29, 2006 by SavageBanshee

[boonman]

I don't think you will have a problem. Is what I would do if it was mine, or I was building it, I would grind out the debris, likely there is pieces of crank/rod/bearing lodged in there. Smooth and polish it up a little, and when you drop the new crank in there, double check there is enough clearance and you will be good to go. My motor had some scars like that when the crank let go, but I polished it up and have had no problem since. That was years ago. :beer:

[BigRed350x]

If you do use jbweld or epoxy make sure you rough up the area prior to putting the stuff in. Use a dremel and put some little dimples in the surface and make it rough so the epoxy has something ot grab on to. Also make sure you clean it really really good before you put that stuff in there so it doesn't get contaminated and flake off later. Some sort of industrial cleaner or almost a light acid to remove the layers of oil and much that are on the aluminum. Any time I use epoxy on cases I always clean it like I were going to be doing tig work on the aluminum. Make sure there is NOTHING there but bare aluminum.