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Question for Dr Mini
https://ausmini.com/forums/viewtopic.php?f=2&t=641		 Page 1 of 1
Author:  mini75 [ Fri May 21, 2004 9:54 am ]
Post subject:  Question for Dr Mini
when i pulled my head of my mini i found that pistons number 1 and 4 were covered in carbon.
how do i remove this without cauzing any damage.
is there a special way.

thanx JIM
Author:  minitec [ Fri May 21, 2004 11:25 am ]
Post subject: 
wire wheel on a drill?
Author:  Mike [ Fri May 21, 2004 2:41 pm ]
Post subject: 
I dont think you should be going anywhere near your pistons with a wire brush (its for the head).

I cranked up the two pistons to the top placed a vacume hose next to the one i was cleaning to suck up all loose carbon preventig it from falling bw the piston and the wall and scraped the carbon off slowly with a plastic spatula (i'd use anything as long as its softer than the aluminium so that you dont scratch the pistons). Then polish it all with a metal polish.
Author:  drmini in aust [ Fri May 21, 2004 6:56 pm ]
Post subject: 
I'd leave it there, particularly if the motor's done a lot of mileage.
That ring of carbon around the edge of the piston helps ring sealing- sometimes if you remove it all, the motor will burn some oil for a bit- until there's carbon on it again.. :lol:
Author:  Mike [ Sat May 22, 2004 4:29 am ]
Post subject: 
Havent they been debating for 30 years about the benefits of a carbon ring in reducing oil consumption and still there's no concensus?
Author:  drmini in aust [ Sat May 22, 2004 6:58 am ]
Post subject: 
Maybe- but last time I took it all off the oil use went up for a bit... :wink:
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