It's stuck.  I'm stuck.

"The Lurktastic Opponaught" (oppolurker) 08/23/2016 at 20:08 • Filed to: 1972 KE175

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The KE175 remains firmly siezed. No amount of any nasty hydrocarbon lube in combination with some hard love from a rubber mallet has managed to pry cylinder from bore. Am I looking at heat (or cold, I can purchase dry ice locally) as my next option? Or am I hosed?

nermal > The Lurktastic Opponaught 08/23/2016 at 20:24

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I assume that you’ve gotten the head off? (huhuhuhu /Beavis)

Have you tried to WD-40 or PB Blast the bloody hell out of it and let it sit overnight?

In theory, if you heat the cylinder and not the piston, it should loosen it up a bit. In practice, it’s slightly more difficult. You could try heating the cylinder with a torch, but too much may cause damage. Perhaps bake it in the oven? Not too long. You want it to be like a piece of meat that’s cooked on the outside and raw on the inside.

BringBackTheCommodore > The Lurktastic Opponaught 08/23/2016 at 20:33

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The last time I had an issue like that, it turned out to be seized crank bearings. Here’s to hoping an overnight soak of PB B’laster or SeaFoam Deep Creep solves the issue.

The Lurktastic Opponaught > nermal 08/23/2016 at 20:34

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Head’s off, tried all manner of ATF, PB, WD, 30 wt, kroil, and a virgin sacrifice. No dice.

The Lurktastic Opponaught > BringBackTheCommodore 08/23/2016 at 20:47

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Sage advice. I’ll look elsewhere.

brianbrannon > nermal 08/23/2016 at 21:05

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Heating just the bore wouldn’t work because the bore doesn’t increase in size when warm.

BringBackTheCommodore > The Lurktastic Opponaught 08/23/2016 at 21:21

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Could always try dry ice on the piston, see if the metal will contract enough to allow movement.

Die-Trying > The Lurktastic Opponaught 08/23/2016 at 22:00

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sounds like some sort of stacked bearing or bent rod.......... have you tried rotating it in the reverse direction, with say a pipe wrench on the balancer???.........

* edit..... its a bike motor........ pipe wrench on the crank snout........

The Lurktastic Opponaught > Die-Trying 08/24/2016 at 13:03

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I’m headed to the bottom end next. I’ll be digging into that section of the clymber manual tonight.