Replacing the engine case


3 replies to this topic
  • BBrown626

Posted April 28, 2008 - 11:31 AM

#1

As a result of my tranny failing I need to replace my engine case. The broken gears knocked the shifting fork guide out of alignment and it is no longer round.

Is there a particular method of removing the bearing retainers that works well? I believe they have hardening lock-tight on the screws.

Any concerns to look for with a new case?

Thank you,

Brent

  • grayracer513

Posted April 28, 2008 - 12:08 PM

#2

Crankcases are replaced as a set.

A little heat will soften red Loc-Tite nicely. Use a propane torch and never heat the aluminum beyond the point where spit bounces off it

Consider having the cases repaired. Two possible approaches are:

> Drill the damaged bore over size, press in a custom made sleeve or plug, or even a bronze bushing, and finish the bore to size as necessary.

> Weld and re-drill the bore.

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  • BBrown626

Posted April 28, 2008 - 02:45 PM

#3

Thanks Gray. I went ahead and ordered a set. At about $400 it might be more than a repair. I would hate to get the bore fixed, start reassembly and then find another problem. With the sort of catastrophic casualty this thing suffered, who knows. I am learning a lot from this repair, regrettably.

  • todds924

Posted April 28, 2008 - 03:38 PM

#4

Thanks Gray. I went ahead and ordered a set. At about $400 it might be more than a repair. I would hate to get the bore fixed, start reassembly and then find another problem. With the sort of catastrophic casualty this thing suffered, who knows. I am learning a lot from this repair, regrettably.


Bearing retainers are held in with Torx fasteners and i have never had to use heat to remove them...They come out easily.





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