treemonkey stuff

[Ketchup]

Is that a fact? I've built a couple of saws. I've had to extract a few broken cylinder bolts. I've never had a stripped cylinder hole in a case, I'm sure others have, but not I. In my experience even though mag is softer than steel, the length of the hole creates a surface area/strength that exceeds the shear strength of the steel bolts. I think the bolt is the stretchy part.

I’ve seen several stripped case holes. 066, 372, 200t. Probably from someone using too much torque starting the bolt (like if the bore flange is sitting on the case wrong), using too short of a bolt, or a loose bolt wallowing the hole. Taking jugs on and off a bunch for porting makes me worry about the case threads. Using an impact could definitely cause destruction as well.

 

[Junk Meister]

Is that a fact? I've built a couple of saws. I've had to extract a few broken cylinder bolts. I've never had a stripped cylinder hole in a case, I'm sure others have, but not I. In my experience even though mag is softer than steel, the length of the hole creates a surface area/strength that exceeds the shear strength of the steel bolts. I think the bolt is the stretchy part.

Looking for that EMOJi with a thoughtfully raised eyebrow.
Ford 2 liter in the 80's REQUIRED that NEW head bolts be used. (NOTE the contradiction--" NEW has to be USED") ..there are others before that but it is the first time I made note of it.

 

[Fabulous]

No stretch would mean no holding force.

Right!

 

[Outback]

Happy you figured out bolts stretch.

As regards whether soft material can hold hard bolts, well I disagree. The more threads you have in a hole the more the load is distributed into the material its threaded into. Its a question of bolt diameter relative to shear strength and length as much as it is bolt material and the material its threaded into as to whether the failure point is the bolt or its threaded hole. If it wasn't, all bolts would be short to save money. Fine vs coarse threads also matters. Don't bring Ford into this, that's just unkind.

I've seen lots of stripped dogs, starters, covers etc, holes, just not cylinder holes. And yet I've seen cylinder bolts missing heads. Never broke one myself so who knows. Should be impossible as the magnesium couldn't possibly win.