Piston Ring Groove Cleaning Tool

[Vintage Engine Repairs]

Hi chaps,

As in the title, can you recommend one for smaller pistons we have in our saws? I can find many automotive ones but the smallest pistons they work on is 2-2.5”. That’s fine for 70cc plus but not for less..

I’m aware of the importance of cleaning the carbon out of the ringlands correctly without scoring, scratching widening or generally damaging them, but it’s a tiresome process and having done it to a good 10+ pistons, I’m over using hard plastic or wooden lollipop sticks and lots of elbow grease.

Thanks in advance,

Tom

 

[old guy]

Use a broken ring.

 

[holeycow]

Yup, a major pita.

A broken off piece of the old ring works the best for me. There's gotta be a better way

 

[holeycow]

Beat me to it!!!

hahaha

 

[Robin Wood]

Use small metal saw and scrape away, broken or worn ring consumes too much time

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[Vintage Engine Repairs]

Thank you gents, much appreciated

 

[holeycow]

Use small metal saw and scrape away, broken or worn ring consumes too much time

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And that too..

 

[Ted Jenkins]

I use any Automotive set of rings. The larger the better. I like to take a little hand grinder and make some notches then to the bench grinder to get the exact width. Very little chance of damaging the grove that way. Always pull the ring towards you. Some times a little fine tuning is appropriate. If you do not use vice grips than a good idea to smooth the edges to keep from getting cut. Thanks

 

[SteveSr]

Use a broken ring.

... and grind the end to a profile of your choosing for whatever you are trying to scrape away.

 

[bwalker]

Soak the piston for a few days in Berrymans carb dip. The carbon then removes easily with a piece of old ring.