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oversized 918cc piston

Posted: Thu Aug 22, 2013 9:32 pm
by smithskids
Still looking for a 4 ring 20 or 30thous oversized piston for an MM, new or second hand but useable .or a set. :(

Re: oversized 918cc piston

Posted: Fri Aug 23, 2013 12:56 am
by DAVIDMCCULLOUGH
East Sussex have new sets of 20 and 30 listed on there web site at £295. I bought these when I did my engine up in 2009. My old ones were +10 and one had broken at the top and the others all had broken the top rings.......

Re: oversized 918cc piston

Posted: Fri Aug 23, 2013 9:44 am
by smithskids
I have a set of low compression plus 20thous so I think I will sacrifice the old piston and machine the top off it and spigot it on to the low compression one. I can then drill and tap four holes straight through the crown and rivet them over and that should do the job!! I used to work for a diesel engine manufacturer and most of our pistons had separate crowns. 8)

Re: oversized 918cc piston

Posted: Fri Aug 23, 2013 4:20 pm
by mike.perry
If you can wait a couple of weeks I will look through my collection

Re: oversized 918cc piston

Posted: Fri Aug 23, 2013 8:59 pm
by smithskids
Thanks Mike, I will hang on.Cheers Iain :D

Re: oversized 918cc piston

Posted: Tue Sep 10, 2013 7:07 pm
by mike.perry
Are you still after those pistons?

Re: oversized 918cc piston

Posted: Tue Sep 10, 2013 10:04 pm
by smithskids
Yes Mike if you have one or a set.That intermitent windscreen wiper you mentioned in the past was made by Hella I have one and it works a treat. they still sell them.
Regards Iain

Re: oversized 918cc piston

Posted: Wed Sep 11, 2013 9:08 pm
by mike.perry
Just checked through my spare pistons, I have only got STD or + 0.060. Sorry :(

Re: oversized 918cc piston

Posted: Wed Sep 11, 2013 11:33 pm
by smithskids
Thanks for looking, I have put the old crown on the low compression piston and its working OK.I have two sets of the low compression pistons but they have no rings, useful for jobs like this.I have just aquired a 1952 MM engine complete so may change it over sometime. Regards Iain.