I don't think it failed for any other reason than poor installation, and me not checking the saw over good when I got it home.
The saw was really clean and didn't look to be abused at all. I'm not sure why it needed a top end, but I asked the guy about it later and he told me that a "shop" had installed it and he bought the saw from them.
If I'd known then what I know now, I would've asked more questions, and I probably wouldn't have bought the saw.
on the up side at least you figured it out before it really blew up! As to the cylinder bolts....a bolt in that situation stays tight by the stretch on the bolt when it is tight. That means the bolt needs to be tightened enough to stretch the bolt longer so it is in tension....that's why there are torque specs to get enough tension on the bolt.....I have found that if you retorque to tighten the cylinder bolts after break in and the gasket settles then that's it it'll stay tight.
good luck
Ditto.
I wonder if we should be installing New cylinder bolts in some instances?
The amount of stretch of the bolt is dependent on the torque applied and the material of the bolt. As long as the bolts are torqued to the proper load per the OEM they should last nearly "forever" (bolt stress is usally kept between 75-80% yield strength). Given they are threaded into magneasium, I'd put money on the magneasium threads pulling out before the bolt is over loaded or damaged... No reason to replace them that I can see.
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