[Vwdiesel] Decoking pistons

[Stephen Kraus]

This may sound funny but: I used some stuff called Purple Power and scalding
hot water in a tub, let the pitsons soak, them removed them occassionally,
rinsed them under scalding water and used a bristle brush to scrub away
deposits. Came out looking shiny and new

On Thu, Aug 12, 2010 at 6:08 AM, mark shepherd <mark at shepher.fsnet.co.uk>wrote:

> Greetings,
> Hopefully someone will be up on the other side of the world.
>
> Just taken my pistons out for a rering, I was having a 'little difficulty
> starting. Fuel economy averaging about 45 to 48 UK mpg. 3 pistons have
> single stuck rings,top or middle some of the gaps could be as big as 1/16th-
> 1/8th of an inch!!
> Bores good, and hastings rings fit to middle of VAG gap spec.  Pistons are
> great and so are all bearings. It loks like my nocking for the last 20 to 30
> ooo miles was exhaust valve clash. I always set belt accurately, but I
> overskimmed the head, and so this mayexplain that.
>
> However my question is this.
> Should I remove the thin layer of carbon deposit between top ring and
> piston face?
>
> Regards
> Mark
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Stephen Kraus
UB3RATL4Sf00 at gmail.com;