- Nov 11, 2013
Repair? WTF? Can cases go in the recycling bin with beer cans?
As they say Dave “shit happens” !
You’re just gonna have to bite the bullet and crack on mate. You know it’s not gonna be pretty in there.
That’s a big chunk missing from the case. You gonna repair or replace?
Do keep the pics and updates coming.
And do let us all chip in and tell you what fancy pants bits to fit... I find it’s MUCH easier spending other people’s money at times like this
I'm guessing the rods went on correctly as no one mentioned anything. Side play isn't really that important, is it? Just as long as there is some?
Hi Dave, you have experienced a blown motor which threw a rod and in the process probably damaged the crankshaft and destroyed the crankcases. By the looks of it due to oil starvation or material fatigue. Now you're rebuilding another using similar old parts of unknown history? I woudn't do that if I were you. Carillo rods, a steel flywheel and a new or rebuilt oil pump is the very least I would fit, especially since this is to become a Combat engine. I would also consider fitting a new through-stud barrel to get rid of another structurally weak spot.
But then again, the original motors lasted for 50 years. It depends on how you abuse them.
I would like to remind of Minor-Palmgren's simple cumulative damage theory:
D = 1 - n/N
where D = 0 represents 0 remaining life (100% of the components fatigue life consumed) and D = 1 is as new. N is the fatigue endurance at each load step and n the number of actual cycles at this load step. The delivered power and load over an engine's lifetime is devided in steps according to various models, one of which is the so-called "rainfall" method.
Estimation of fatigue life consumption assumes you know the history of the component. If you don't know, well ......
Of course there can be other causes of malfunction, oil starvation for instance. Monitoring is as important for old engines as it is for new ones, probably even more so.
Only managed to break TWO of @Mike T's tools...
The second tool to fail was the pinion puller. Fortunately it still did the job with only two arms. Does anyone have a spare one laying around they want to sell?
The good news is that it should be ready to split, what else could possibly go wrong???
As per the post on Facebook, it looks much the same as the hole on mine. Mine has been successfully welded although I've no pics as its still with my mate for further finishing.