cavelamb wrote:
Anthony W wrote:
cavelamb wrote:

Second to the fin heat limits, that's the biggest problem with VWs.
The cylinder (and head) hold downs just thread into the case.

That problem is solved with over sized case savers. They bite into a
much larger amount of the case and spread the torque around to more of
the case. It's amazingly rare for one of these to pull out.

Tony

I've used those - just makes sense.
But if one is designing an engine rated at over 80 hp, it would be a
good thing to address...

An aluminum rather than a magnesium case and studs with a longer
threaded section would solve the problem. There are thousands if not
millions air cooled motorcycles and pulling a stud only happens when
some idiot over torques the stud. Even then, it's more common for the
stud to snap.

Tony