. 0005 on my 2018 at the time I built it to 120, that was never run with 1 mile.

 

Did you mean .005 ?

 

Them zeros make ALL the difference

 

In my opinion, the ridiculous crank runout is what's causing the compensator failures. How can a company allow .012 runout? Nothing will survive in that environment for long.

 

And yet, there are quite a few M8s rolling with high miles and no compensator or other problems.

How do we explain this?

 

Not everyone has an out of round crank, just like not everyone has a bad compensator.

 

But the arguments I'm seeing indicate dissatisfaction with the HD spec, saying it is too large. Not that a few got past QC.

 

They set the high spec to keep warranty down and room for error. They all pass QC when the standard is so low. If .012" is the allowable limit at the factory as well and one checks out at .004" and one at .010" they both go on down the line. One guy lucks out one doesn't and the allowable tolerance means inconsistency and maybe even go so far as to say you're lucky if you get a great one.

Allowable oil consumption is another high allowable limit that really is ridiculous.

We live in a mediocre world ladies and gentlemen.

 

I agree about general mediocrity.

But, there are literally hundreds of thousands of these engines motoring over the highways of the world. Very, very few of them are having failures of any kind. Let alone the kind of problems (oil pumps, compensators) being ruminated about here.

This suggests to me that spot measurements of this and that are relatively unimportant. Now, if we had a failure rate around 99% then we could be talking about something. I've personally seen a tendency in gear heads to get obsessed about some little particular that really is of no practical consequence. The machine is designed to run well in specific conditions, to get us there and back safely. As long as it does this, where is the problem?

 

I have no idea of the failure rate but it does sound like there is something going on that might be traced back to tolerance stack-up with the sumping issues and pump failures. Goes back to high allowable tolerances with two or more borderline (within limits) parts coming together in the same engine. Presto you have a turd. Since theres a bulletin on the sumping concern there must be a regular enough occurrence to warrant it. Yes im off topic (sort of) but with cranks as true as skipping ropes and pistons going chernobyl roughly for 3 model years now not to mention transfer someone dropped the ball. Makes me think an old shovelhead with an intake manifold leak is still a better engine than an M8.