[Vwdiesel] Decoking pistons

[mark shepherd]

Thanks for the replies chaps. I've taken photos but, here's a little update, 
as I'm too tired to upload them tonight!

Upon taking the pistons out, all shell bearings and wrist pins no wear.
All 4 middle compression rings stuck in.
2 top rings stuck in, one completely and one halfway round.
One oil ring stuck.
Valves seem to have survived.
Tomorrow along with some photos, I'll  show just how big a top ring gap can 
get and still [a week ago] have a starting engine.
Any guesses? :o)

No carbon on piston crowns, other than some wipe clean stuff. Some skirt 
skuffing on one piston only...

Oven cleaner seems to soften most carbon.

Later

Mark
----- Original Message ----- 
From: <LBaird119 at aol.com>
To: <Vwdiesel at vwfans.com>
Sent: Thursday, August 12, 2010 8:50 PM
Subject: Re: [Vwdiesel] Decoking pistons


>
> In a message dated 8/12/2010 10:34:52 AM Pacific Daylight Time,
> r.c.brown at ieee.org writes:
>
>> after one somewhat foggy night, popped the hood to find the carbon had
>> all bubbled up like
>> it had been hit with paint stripper. It came off easily with a wooden
>> scraper. So I think
>> it was the combination of the WD40 and the moisture in the air that did
>> it.
>>
>
>  Water is generally the best for removing carbon.  The problem is
> time.  It takes a little time and the right conditions and you get
> what you saw!
>    Loren
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