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Author Topic: Cleaning up a piston  (Read 1114 times)

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Offline Canadiana

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Cleaning up a piston
« on: May 24, 2018, 07:52:50 PM »
I've cleaned the carbon build up on a piston. The piston and ring look pretty good but i want to remove that small amount of build up in the ring groove. My piston is aluminum  (i think), can i use a brass bristled toothbrush (wire brush) or will i wear on the piston? The piston is used but certainly reusable so i don't want to add anymore wear to it. Thanks and happy rebuilds to ya!
The saw is more fun than the purpose of the wood... the forest is trembling 🌳

Offline Al_Smith

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Re: Cleaning up a piston
« Reply #1 on: May 26, 2018, 06:25:18 PM »
It won't hurt it with a wire brush .

Offline teakwood

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Re: Cleaning up a piston
« Reply #2 on: May 28, 2018, 07:40:49 PM »
brass is ok. steel is not
National Stihl Timbersports Champion Costa Rica 2018

Offline joe_indi

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Re: Cleaning up a piston
« Reply #3 on: June 03, 2018, 02:14:15 PM »
A toothbrush and toothpaste (yes toothpaste) will clean up the piston better and with no wear.

Offline Canadiana

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Re: Cleaning up a piston
« Reply #4 on: June 04, 2018, 11:06:37 AM »
Does that freshen up the exhaust too smiley_airfreshener :D
The saw is more fun than the purpose of the wood... the forest is trembling 🌳

Offline Al_Smith

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Re: Cleaning up a piston
« Reply #5 on: June 04, 2018, 05:27:37 PM »
It depends on the wire brush .Some steel is rather soft,you won't damage the piston or at least I never have .On the other hand some are so stiff you can peel chrome with them .Now I'm talking about a wire brush power driven like on a bench grinder type of thing .

Offline joe_indi

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Re: Cleaning up a piston
« Reply #6 on: June 04, 2018, 09:24:25 PM »
Does that freshen up the exhaust too smiley_airfreshener :D

Yes! It will work extremely well with a gritty toothpaste :laugh:
Use water as solvent. After the cleaning/freshening ;P rinse off with water, dry it and wipe all over with fuel.

Offline Iwawoodwork

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Re: Cleaning up a piston
« Reply #7 on: June 05, 2018, 01:25:19 AM »
I worked in a parts house/machine shop (about 61-62)when in high school and one of the machinists showed me to just use a piece of the old rings , break about in 1/3s and pull that around the ring grove a few times. I did that on my old 2stroke (early 60s) motorcycle pistons many times. we didn't have the specialty 2 stroke oil at that time so we poured the oil to the mix, really carboned engines up.

Offline Al_Smith

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Re: Cleaning up a piston
« Reply #8 on: June 06, 2018, 05:41:09 AM »
Generally speaking on a two cycle engine the only carbon build up will be on the piston face,the top of the piston .If you are squeamish about a wire brush 3m Scotch bright with some kerosene plus some "elbow grease " will clean it right up .

If it has some scorch on the exhaust side this stuff will buff that right out .A piston doesn't have to shine like a new penny or be perfect to work well .


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