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2manyrides 10-09-2012 03:06 PM

video about rusted piston
I had made a video...Rust's a link for it.
It was posted somewhere on ADV back in the day.
It was 3 B50's that I disassembled.

Well, now I found some old video tape and created a video about trying to hammer a seized piston through the bore on one of them.
Oh the horror, a 3lb sledge whacking away on the piston dome!

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killfile 10-09-2012 06:40 PM

the horror, the horror!

sounds like this was quite a while ago since you just found the video tape... how did this one turn out?

2manyrides 10-09-2012 07:54 PM

A salvage job to save whatever I could from the rusty hulk.
The sleeve cracked at the bottom as the piston was driven through.
I did save the jug and it's good fins though. (in case I ever need one)
Throughout that motor things were rusted and deeply pitted.
Tranny, clutch ect...

Saved a bunch of pieces, didn't intend to worry about the crank, cases, ect...

It was 2008
Don't I never had any intentions of rebuilding that motor!

There's other candidates with a better start.
It was in a down time while waiting for one that I was rebuilding.
Since I was going at it, I figured I'd stay busy by pulling some of these apart.

bmwhacker 10-14-2012 06:37 PM

When there's a will, there's a way....
but I think you need a taller work bench / engine stand assembly. :lol3

2manyrides 10-15-2012 08:59 AM


Originally Posted by bmwhacker (Post 19818253)
When there's a will, there's a way....
but I think you need a taller work bench / engine stand assembly. :lol3

Ha, ha!
Well ya use what you got. The wrought iron table base served as a strong base to mount the B50 stand to.

LashLarue 11-06-2012 07:41 PM

Hot oil
What was that EVOO for cooking? Tell us a little about 'the hot oil treatment". How hot, how much, how long?

2manyrides 11-07-2012 09:22 AM

the oil scene
I had been posting a bit to field ideas about how to unstick this thing. It had the bore soaking in penetrating oil for weeks with NO help at all.
Olive oil was suggested as the medium. I was told that hot oil poured into the chamber would do the trick.

Let me again mention the circumstances with this motor...
This bike had sat in the rain in a field for more than 15 years with the carb off. It was basicly "fused" with corrosion.

:dealThe suggestion was that as the oil's heat transfered to the parts, I'd here a click or a "snap" as it expanded and unstuck. I never heard a click.
After the application of hot oil I began to beat the sucker again as seen in the driveway. It was not until I gave it "all I got" that it gave way. 30+ whacks well defined wasn't enough. I had to wail on it.

I'd have to think that a lesser fused item would break loose with the hot oil method. How hot was the oil?
I had it at flash point. Very dangerous!:eek1
A link to the original discussion...(in the link above)
Post # 17 by
bk brkr baker
Beastly Adventurer

gave me the idea...:wink:

A block of wood was no good.
during the heavy hitting a 6"X2" nipple, a 2" cap and coupler were utilized to better meet up with the top of the piston.
You can see the deformed cap which resulted from hard hits!

Hope that answers your Q...let me know if not...

What? 11-07-2012 09:50 AM

It took me a minute to figure out how you were "talking on the phone" and getting the camera to record it.Did you come up with the "put one radio near the camera and talk into the other" on your own? I want to know who to thank when I steal the idea.

2manyrides 11-07-2012 10:44 AM

ha, ha...two way radios
Creative minds want to know what was my low tech method of wireless communication with the camera.
Works great on the trail when discribing scenes.
Cool to have the acknowledgement beep in there when you let up the button.

Use this method with my approval. Thanks for speaking up about it!:deal

TwilightZone 11-07-2012 07:41 PM

>"I'd have to think that a lesser fused item would break loose with the hot oil method. How hot was the oil?"

Dinna try heading the barrel with a rosebud tip (oxyacetylene torch) ???

2manyrides 11-08-2012 05:49 AM

Tried a propane torch as seen in the video...
No results....

Don't have a torch, or a press, or much of anything related to a real shop besides wrenches.
I have a 3lb sledge and a splitting maul....:dhorse

LashLarue 02-17-2013 08:59 PM

I used the "fire" method successfully after soaking an engine for 8 months in various concoctions. First time I tried fire, it did not work. Second time, no worky. Third time was a charm but I did it different. I filled it with leftover coleman fuel, burned it until it was out of fuel waited 5 minutes for safety, and repeated. After the third fire I hammered it like heck and it came free but what still a B until it cleared the cylinder.

I never heard a pop either and it did not move until I knocked the stuffing out of it (and damaged the cylinder). That was ok, I wanted the rest of the parts.

The burn time was about an hour for the three burns. Depending upon how much fuel you can get into the cylinder, you may have to do more or less. Just keep heat on it for an hour.

2manyrides 02-18-2013 05:45 AM

Having the bore filled with burning coleman fuel sounds like a pretty good way to heat things say the least.
Took 3 burnings though??? And 8 months soaking? That's being patient...

The sleeve on this one was cracked down at the bottom from forcing the now oversized piston down through the bore.

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