[Vwdiesel] Decoking pistons

[mark shepherd]

I think these messages were just released by Loren after quarantine. :o)
All shell bearings were good. No play in wrist pins either. Nothing bent, 
all valves perfect. All I ended up doing in the end, was to re-ring [$22], 
and a light honing with a plastic bottle covered with coarse emery paper.
The subsequent results are on the mileage graph.
The gumming up was probably down to my using multigrade oil. As it was using 
it/burning it, I chose not to use quality oil, and used to top-up, rather 
than replace. Still using multigrade, but will replace more often.

Mark

----- Original Message ----- 
From: "Bryan Belman" <dieselwesty at yahoo.com>
To: "vw fans" <Vwdiesel at vwfans.com>
Sent: Wednesday, October 06, 2010 10:35 PM
Subject: Re: [Vwdiesel] Decoking pistons



Looks re-buildable, but sure is ugly now. Wow, never saw rings like those, 
have
to see what things look like after they are given a good bath.
Are you just going to hone the cylinders with the block in the car? you must
have dropped the crank already.
Bryan Belman, Pt. Pleasant, NJ
04 Jetta Wagon TDI PD, 100hp, 5sp -- running :<)
92 Jetta 1.6 Eco-Turbo Diesel, 5sp -- running :<)
82 Diesel Westy 1.9NA -- running :<)
70 Type 1 stock Beetle -- Running :-)




________________________________
From: mark shepherd <mark at shepher.fsnet.co.uk>
To: vw fans <Vwdiesel at vwfans.com>; mark shepherd <mark at shepher.fsnet.co.uk>
Sent: Thu, September 23, 2010 9:58:03 PM
Subject: Re: [Vwdiesel] Decoking pistons

Sorry not meaning to bump this , but my linking skills are somwhat lacking,
and most of the pictures weren't visible, [to me at least!]
Click on the revealed picture!
http://img255.imageshack.us/g/piston1andstuckrings.jpg/

Mark


----- Original Message ----- 
From: "mark shepherd" <mark at shepher.fsnet.co.uk>
To: "mark shepherd" <mark at shepher.fsnet.co.uk>
Sent: Friday, September 03, 2010 2:08 AM
Subject: Re: [Vwdiesel] Decoking pistons


>
> At long last I got round to uploading some pictures. Here is a picture of
> a set of rings. Not sure if they were of the 160psi cylinder, or one of
> the two 200psi ones, or even the 270psi one. Has anyone run with bigger
> gaps? The pressure was less than my old vw gasser. Scrolling should give
> the other pictures, in no particular order, but titled according to what
> they are.
>
> http://img809.imageshack.us/f/imgp9942.jpg/
>
> Subject: [Vwdiesel] Decoking pistons
>
>
>>
>> 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
>> _______________________________________________
>> Vwdiesel mailing list
>> Vwdiesel at vwfans.com
>> http://www.audifans.com/mailman/listinfo/vwdiesel
>>
>
>
>



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