Date: Mon, 3 Mar 2003 17:52:57 -0600
Reply-To: Stan Wilder <wilden1@JUNO.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Stan Wilder <wilden1@JUNO.COM>
Subject: Re: [T2] A cc'ing the heads question-answered
Content-Type: text/plain; charset=us-ascii
Darn John you gonna write a book?
CC ing a head is just a way to measure the volume of the cavity in the
head.
Normal procedure is to get a laboratory vile that contains graduated CC
marking in the side.
To get the CC of a head it is just a matter of drawing off fluid from the
vial and putting it in the combustion chamber of the head, deducting what
is missing from what remains in the vile after you've filled the cavity
(combustion chamber) of the head.
The point in doing this is to: No1) Find out the cc for calculating
compression ratio, total cc of an engine and matching the combustion
chambers by grinding away some non essential area.
No 2) Having this information on a VW engine can tell you to add shims,
head gaskets or leave them out to get the desired combustion ratio.
Others might have more to add but I see that as the basic reason and
procedure.
Stan Wilder
On Mon, 3 Mar 2003 16:52:22 -0600 John Rodgers <j_rodgers@CHARTER.NET>
writes:
> I sort of got lost on this thread about '"CC"ing the heads. Would
> you
> mind explaining what this "CC"ing thing is. What is it for. And is
> there
> any possibility that pictures and procedures and find their way to
> a
> website if not already done. If done, I'd like to know where.
>
> Thanks a bunch.
>
> John Rodgers
> 88 GL Driver
>
> Tom Young wrote:
>
> >I ended up using rubbing alcohol colored with a few drops of food
> coloring.
> >Cheap ($.79 for a big bottle), safe, and worked like a charm,
> completely
> >eliminating my "sticky" bubbles problem.
> >
> >I might mention that before cc'ing the heads I bought three
> carriage bolts,
> >7 inches long and 3/8th's inch in diameter, and six nuts. Using
> the 3 bolts
> >and the outside rocker arm stud of the head that wasn't being
> measured as
> >the 4 "legs" touching the top of my workbench the head was
> completely stable
> >and could easily be manipulated (by screwing the bolts clockwise
> or
> >counter-clockwise) to get the air bubble directed at exactly the
> right spot.
> >This made for very repeatable measurements.
> >---------------------------------------------------------------
> >Tom Young '81 Vanagon
> >Lafayette, CA 94549 '82 Westfalia
> >---------------------------------------------------------------
> >----- Original Message -----
> >From: "Chris Mills" <scm9985@tntech.edu>
> >To: "Tom Young" <tomyoung1@attbi.com>;
> <vanagon@GERRY.VANAGON.COM>;
> ><type2@type2.com>
> >Sent: Monday, March 03, 2003 12:27 PM
> >Subject: Re: [T2] A cc'ing the heads question
> >
> >
> >
> >
> >>>I like using the colored water because it's safe and easy to
> dispose of,
> >>>
> >>>
> >but
> >
> >
> >>>I'm thinking perhaps I should use a solvent of some sort -
> kerosene,
> >>>
> >>>
> >paint
> >
> >
> >>>thinner, etc. - if it will help eliminate my bubble problem.
> >>>
> >>>
> l Mystery oil (thinner fluid)?
> >>
> >>
> >>Chris Mills in TN
> >>
>
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> >
>
>
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