Author Topic: 1st and 2nd piston ring positioning  (Read 395 times)

Offline agonda1

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1st and 2nd piston ring positioning
« on: 18.11. 2015 19:11 »
Have noticed that 1st and 2nd piston rings have a reduced 'notched' corner maybe only a few thou.Does this corner face up or down ?

Thank's

Jim

Online RichardL

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Re: 1st and 2nd piston ring positioning
« Reply #1 on: 18.11. 2015 21:14 »
I think you will find that there is some etched-in text on one side of the ring and that should face up, as I understand it. Feel free to wait for a second opinion.

Richard L.
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Offline Triton Thrasher

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Re: 1st and 2nd piston ring positioning
« Reply #2 on: 18.11. 2015 21:17 »
Rings usually come with instructions.

If you post a picture, we might have some idea.

Offline Triton Thrasher

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Re: 1st and 2nd piston ring positioning
« Reply #3 on: 18.11. 2015 21:26 »

Offline The Artful Bodger

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Re: 1st and 2nd piston ring positioning
« Reply #4 on: 19.11. 2015 00:54 »
In days of old some rings when supplied not with pistons, had a step on the outer corner, these were for the rings to clear any "step" worn in the bore. So the top ring would have the step to the top and the lower ring to the bottom. Very possible when fitting new rings to a slightly worn bore for the ring to break when it hits the step.
 
Colin

Offline agonda1

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Re: 1st and 2nd piston ring positioning
« Reply #5 on: 19.11. 2015 13:26 »
Thank's  -  will go along with this explanation

Jim

Online bsa-bill

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Re: 1st and 2nd piston ring positioning
« Reply #6 on: 19.11. 2015 16:13 »
Good post Dodger -  logical when you think about it
All the best - Bill
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