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Ding In Piston... Still Usable?


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#1 HarrysMini

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Posted 15 October 2013 - 02:10 PM

Hello everyone,

 

While I was disassembling my engine, one of the pistons dropped straight out of the bore as soon as the engine was moved  on the bench, I was expecting it to need some persuasion as every other engine I have stripped has. It has got a couple of small nicks in it, will it be usable after a light sand to smooth it a little? I attach a photo below.

 

IMG_1064_zps177a2b13.jpg

 

 

Any help would be appreciated.

 

Edit: Also, while I'm here, does anyone know where to source piston rings for these MG Metro pistons, 20832?


Edited by HarrysMini, 15 October 2013 - 02:12 PM.


#2 Cooperman

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Posted 15 October 2013 - 02:15 PM

That piston will be fine. Just clean up the very slight damage with some emory cloth.

 

Piston rings from F.W. Thornton of Shrewsbury. Just give then a call and they'll sort out a set for you.



#3 HarrysMini

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Posted 15 October 2013 - 02:32 PM

Thanks Cooperman. I will do that, and give the company you suggested a call.



#4 Rog46

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Posted 16 October 2013 - 06:57 PM

Don't worry about the indentation just clean off any bits that are poking above the surrounding surface.

#5 Cooperman

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Posted 16 October 2013 - 08:50 PM

You just need to ensure that there are no sharp indentations which could cause local 'hotspots'.



#6 HarrysMini

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Posted 16 October 2013 - 09:06 PM

Okay thanks people. So I will use some emory cloth on them and see what happens. 



#7 Cooperman

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Posted 16 October 2013 - 09:18 PM

On the indentation at the edge it would be best to use a small round file and then chamfer each side and polish it so that the edge is smooth even it not flat. There is plenty of 'meat' at the edge so there will be no risk. The other indentations can be rubbed smooth with emory cloth.






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