Look what soaking these in vinegar for a day and scrubbing with a brass brush can do. (The one on the left)
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750 TSCC Rebuild or Replace?
- Thread starter Rich82GS750TZ
- Start date
Looking good
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Getting the donor engine prepped for install, I spent about 3 hours today cleaning up the base gasket surface on the block. As I’m moving the pistons out of my way I realize that #4 piston’s rings are not moving freely like the others. All rings on #4 are frozen into their recesses at their tightest diameter. I removed the ring from one side on the pivot pin (it subsequently vanished into the ether, lucky it didn’t go in my eye) and drove the pin through and removed the piston.
I assume I’ve got to replace the rings on at least on this piston. How do I get them out? Soak in PB? Do I definitely have to replace all the rings on all pistons? That’s $120 more dollars I didn’t want to spend on this engine.
I assume I’ve got to replace the rings on at least on this piston. How do I get them out? Soak in PB? Do I definitely have to replace all the rings on all pistons? That’s $120 more dollars I didn’t want to spend on this engine.
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There is carbon in the ring land. Maybe some varnish too. You can try soaking the piston in carb dip to loosen. A better method is to first remove the rings though and then soak. Use an old ring, broken in half, to scrape out the old carbon. Just be careful to not scratch the aluminum.
Depending on how much time you have - I left the pistons with their stuck rings sitting in cans of paint thinners and ATF on the bench. By the time I got around to them they were all lovely and free and clean enough to lick your dinner off.
I think I’ll quit for tonight.
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Thing is, I KNOW to not wear gloves when working close around spinny tools like a drill press, especially with a wire wheel. Yeah, time for a beverage.
Only thing damaged was a little bit of skin on my hand. The glove and piece I was cleaning up are fine. Yes passenger peg support. The swingarm rod goes through it too.
I think I?ll quit for tonight.
Pro tip: instead of that wire wheel, clean your aluminum bits with an SOS pad. Just a dab of water, make a gooey blue mess and rinse. Ready for some Mothers polish
on a soft cone on the drill to finish
Great tip. Should have thought of that.
How's the hand today?
Thanks for asking.
A little sore but not too bad. Could have been so much worse. Merely a flesh wound. Tonight I remembered I had a pack of these little gems. They’re a lot more expensive than an sos pad, but really make short work of it, and I’m impatient. Did manage to wrap my tshirt in the Dremel bit. Much less trauma. Quickly pulled the plug.
On a related note: it would appear that I have found the valve adjuster nut that caused the damage inside the head of my original engine. I just happened to see it laying on the garage floor hiding on a rug. I still want to tear down that engine completely, later.
On another related note: donor engine struck #4 piston rings still soaking. I came across this eBay sale for 4 pistons with rings with 1500 miles on them. For $30, I figured it’s worth a shot. Waiting on those and base gasket. I should get the frame and wiring mostly put back together this weekend.
A little sore but not too bad. Could have been so much worse. Merely a flesh wound. Tonight I remembered I had a pack of these little gems. They’re a lot more expensive than an sos pad, but really make short work of it, and I’m impatient. Did manage to wrap my tshirt in the Dremel bit. Much less trauma. Quickly pulled the plug.
On a related note: it would appear that I have found the valve adjuster nut that caused the damage inside the head of my original engine. I just happened to see it laying on the garage floor hiding on a rug. I still want to tear down that engine completely, later.
On another related note: donor engine struck #4 piston rings still soaking. I came across this eBay sale for 4 pistons with rings with 1500 miles on them. For $30, I figured it’s worth a shot. Waiting on those and base gasket. I should get the frame and wiring mostly put back together this weekend.
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My friend calls it donating knuckle meat to the gods. I ripped open my knuckle once tightening a drill bit. Tip: do this without the drill plugged in. My hand slipped and hit the trigger, and the chuck cut to the bone, still have the scar.
I use a weak mixture, probably 1:4 of muriatic acid (pool cleaner) and water on rust, being very careful and using baking soda in water to rinse. Maybe there's some down side to this but it works fast and gets it all, nothing metal it hasn't quickly cleaned up.
I use a weak mixture, probably 1:4 of muriatic acid (pool cleaner) and water on rust, being very careful and using baking soda in water to rinse. Maybe there's some down side to this but it works fast and gets it all, nothing metal it hasn't quickly cleaned up.
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