Compound fracture Pt 3. The rebiuld.

Well things finally look to be going forward slowly.....
The recap... A 72 Combat Roadster as per the Avatar, Which developed an oil leak at 300 miles on a Rebiuld.



An oil leak caused by a stray Crankshaft Stud Nut.



This nut was supposedly Loctited and tightened as per the rules. I couldn't see any Red stuff on it.
Anyway, damage was done, an agreement was made with P.O., and we set about to remedy the problem.
There was some welding to be done.







And I took the opportunity to do the Oil scavenge mod and Breather mod.
The old style Pistons have been replaced along with a new 4s Cam, Radiused Followers and Valves.
The damaged Cam tunnel was tidied up, as was the Follower tunnels, and another set of new bearings
and Crank bolts, gaskets etc. etc.
At .040th over, it is said to add .33 to compression...ie. 10.33-1 so I took it upon myself to remove .020th
from the tops of the pistons, just to keep compression down to a little less scary 9.75-1 ish.
I know it's not much, but it made me feel better.
I guess I am lucky to have got all the new parts supplied by P.O. from RGM, but still will cost me plenty of dollars and the last bit of good riding weather.
Stay tuned, I'm now relying on a mate to get the motor together.... more to follow...
AC.
PS... I have to add that P.O. did offer to do all repairs neccessary, at no cost, however I settled for the NEW parts and a FRIEND to do the work.

Ugh, and ain't your fault but sure is your problem. The only crack that is significant-tricky is the one through the mounting flange, the other is just leak-cosmetic. Might consider grinding out the sharp factory stress riser to fill back in then grind a radius then beat on it with slag hammer to bring the seam back to sealing close. That's in addition to melting-filling inside of mount area for case strength.

I have NO faith in locktite inside engine or gear box and nip up crank nuts beyond what manual lists. Lock tabs are factory insurance.

Yeah I like lock tabs.
Anyone can see there was no Loctite on that bolt, so now all the others get checked.
Look what I found floating around in side the Scavenge gallery while admiring the weld job, up to the light... 5/16 UNF.



I had to remove the small plug at the rear to get it out, how it got in there I don't know, no way could I get it back in through the same hole.!
The Gallery would have most certainly been blown out with the Air hose,.. Hopefully one of us would have picked up on it.
This might be a good advertisement for small Scavenge holes.
AC.

Slowly wins the race, apparently, I think I'm winning.

A sad and loanly figure.













Every body should have a mate like Baz. Sidecar racer, builder extroadenair.



I hope this thing works GP.



These are the same Caps , as for sale on Ebay, AUST.





I know it's not exciting to those who have done this often, but this is a great feeling.
AC.

Yeah just another boring blow up rebuild, but dang didn't you use any sealing goop?
Did I miss reading how the case cracked repaired? Where are the scars?

Goop?, yep goop, just like to clean up meticulously.
The mating surfaces were excelent. I'm of the same opinion as Baz..... Not tooo thick with the Goop.
Don't want it squeezing out inside.
Pretty tidy weld up. eh ?
AC.

Yes yes and yes, dang it. But then again it was merely slight cracks not distorted twisted cases needing over a foot and a half of bead and beating back to fit.

I do so appreciate a clean machine, we all do, so thanks for showing off your tedium success I'll toss and turn to match myself, maybe.