In the "Ask a stupid question" category, my contribution for the evening. If
the engine isn't dieseling or obvously choked up, do you really want to remove
all the carbon? I have heard it mentioned by hoary old mechanics that the
carbon buildup is good for tightening the piston/cylinder clearance up and for
raising the compression ratio a bit. Getting the excess flakey bits off the
piston tops I can go for, but carefully polishing and cleaning could actually
be counter-productive. Or is that just an old myth from the dawn of time when
dynamite-powered cars were still on people's minds?
Mark
1972 TR6
________________________________
From: owner-triumphs@autox.team.net on behalf of Paul Willoughby
Sent: Mon 15/05/2006 6:53 PM
To: Cosmo Kramer; triumphs@autox.team.net
Subject: Re: [TR] Decarboninzation
A quick correction to Cosmo's item 3: The original poster (Robert Houston)
suggested adding water, not Coke. -paulw
Robert's text:
"The old wives tale to fix this, supposedly used by VW mechanics, is to rev
the engine to a very high idle and slowly pour a small coke bottle of water
into the intake through the carb, just enough to make it stumble a little,
but
never enough to stall the engine."
----- Original Message -----
From: "Cosmo Kramer" <tr4a2712@yahoo.com>
> 3- The last reply was to pour a 'small' bottle of coke
> [I recall the small old bottles were only about 7
> oz.?, back then] down the carb's throat with the
> engine running at a 'high ideal'. Now how high is a
> 'high ideal' was never exactly mentioned. The engine
> would then have the water turn to steam & thus
> steaming off the carbon.
> I do remember reading something about this on this
> list several years ago, but can't remember exactly how
> the thread ended.
>
> Now I did read in the last TRIUMPH Digest News Letter,
> Jerry Van Vlack (JVV)asking how much carbon is to much
> carbon on a Piston Head? He also had a GOOD Point
> about knowing if one had 'to much carbon' on the
> Piston Head WITHOUT removing the Engines Head 1st.
> Well I did remove my engine's Head last year to do a
> repair, but was more concerned about getting the
> repair done to be able to still have some driving
> season left. I live about 25 miles from Buffalo NY, &
> our average 'driving season' is only about 6 months.
>
> I really would appreciate it if some people would
> reply to the 3 suggestions mentioned above. I also
> would like to have replies to Jerry's point of: How
> much carbon is TO MUCH carbon on a Piston Head? [even
> if you did remove the engine's Head. TIA,
>
> -Cosmo Kramer
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