2 replies to this topic

[Ricester]

I have a 998 a+ engine for my mini. It’s not the original engine which allegedly seized some time before I bought the car. I’ve never seen this engine running. I presume it’s been bored at some stage.

I need new piston rings. My pistons are all stamped AE 20773 +0.508 JFT.

It’ll be my lack of experience no doubt but I cannot understand what the +0.508 means. I presume if these were size +0.60 or +0.40 they would be stamped as such.

Can anyone elaborate on what size my pistons are and what the JFT stands for?

Thanks

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Edited by Ricester, 09 December 2021 - 07:19 PM.

[timmy850]

0.508mm is 0.02” or 20 thou

[Ricester]

0.508mm is 0.02” or 20 thou

Of course it is, thanks for that!!! Been doing my head in.