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Head Chamber CCing
Posted by: Wagon Master ()
Date: November 29, 2019 04:51PM

What fluid do you guys use to cc combustion chambers and why.
Thanks all.

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Re: Head Chamber CCing
Posted by: cnicol ()
Date: November 29, 2019 05:08PM

I use water. It's readily available, easy to clean-up, and not so thin that it leaks through the valves. Of course I blow things off afterward using compressed air and oil or WD-40 the valves.

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
60 Monza coupe (sold, sniff sniff)
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts

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Re: Head Chamber CCing
Posted by: MattNall ()
Date: November 29, 2019 05:30PM

Food dye... in water...

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Head Chamber CCing
Posted by: jjohnsonjo ()
Date: November 29, 2019 05:34PM

Mouth wash, really

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa


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Re: Head Chamber CCing
Posted by: chris ()
Date: November 29, 2019 05:45PM

I use wintergreen rubbing alcohol (copied from Ken Hand). I never thought about the mouthwash but that’s a good idea.

'65 Monza 4 door
4 speed
110hp
Gardner, KS

Heart of America Corvair Owners Association

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Re: Head Chamber CCing
Posted by: joelsplace ()
Date: November 29, 2019 08:26PM

If it leaks through the valves you need to fix them.

Joel
Northlake, TX
5 Ultravans, Lost count at 100 Corvairs...

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Re: Head Chamber CCing
Posted by: REM654DPG ()
Date: November 29, 2019 08:32PM

Clean solvent works good and then I can dump it right back into the solvent tank when I’m done. For me everything is right there next to the workbench so it’s just convenient and non corrosive too.

Regan Metcalf
Portland, OR

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Re: Head Chamber CCing
Posted by: JimBrandberg ()
Date: November 30, 2019 05:00AM

I prefer something thicker. I usually use ATF because I like the red.
I used power steering fluid for a few years because I had some. A goldish color not nearly as much fun.

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: Head Chamber CCing
Date: November 30, 2019 12:40PM

When I machined heads for a living, we cc’d with Stoddard solvent ( parts cleaner). The down side is it’s thinner than water and will show every leak/crack quickly.

Today I use Marvel Mystery oil. It’s thicker and smells better!smiling bouncing smiley

---------------------------------------------------------------------------------------------
You're unique, just like everyone else...

Johnny B
Central WI

Wife's '68, 3.0L, twin-screw compressor and fuel injected in the works...

Project Pressurized Pancake


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Re: Head Chamber CCing
Posted by: joelsplace ()
Date: November 30, 2019 01:22PM

Don't you want to find leaks/cracks?

Joel
Northlake, TX
5 Ultravans, Lost count at 100 Corvairs...

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Re: Head Chamber CCing
Date: November 30, 2019 01:55PM

Generally, yes, but sometimes it made things seem worse than they really were.


I’ve cc’d heads with water and the valve job seals, and with solvent it doesn’t. Solvent is simply more viscous than water.

I’ve used transmission fluid as well, but it takes longer to flow out, and the thinner fluids shed the bubbles easier as well.

---------------------------------------------------------------------------------------------
You're unique, just like everyone else...

Johnny B
Central WI

Wife's '68, 3.0L, twin-screw compressor and fuel injected in the works...

Project Pressurized Pancake


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Re: Head Chamber CCing
Posted by: vairmech ()
Date: December 01, 2019 05:10PM

When you do cc'ing you should put a thin layer of grease on the valve faces. I also use a same thin layer of grease around the gasket area on the block off plate. That way I have no leaks and no false indications of cc's. The same for the gasket, the extra volume can give you about .1 cc difference!

I use the wintergreen alcohol as was mentioned. Bubbles come out easily, I have 4 escape holes in my plate plus a larger one for the fill in the center. I use a burette similar to the one shown earlier. The wintergreen can be seen and I use a turkey baster to suck out the alcohol when done and I re-use it. It is easily cleaned and dries quickly but it does have about 15% water added to it. The head also has to be level.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Head Chamber CCing
Posted by: JimBrandberg ()
Date: December 03, 2019 04:12AM

I grease the plexiglass disc with Syl-Glyde but figure if the valves and seats won't hold ATF they won't hold cylinder pressure.

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: Head Chamber CCing
Posted by: vairmech ()
Date: December 03, 2019 05:09AM

The procedure I mentioned is right out of either How to Hotrod or the tech guide.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Head Chamber CCing
Posted by: Wagon Master ()
Date: December 08, 2019 08:19AM

I just cc'ed my 140 heads with the gasket register milled to the squish or quench pad and got 48 cc's sound close to what others have gotten?

Thanks.

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Re: Head Chamber CCing
Posted by: nginbldr ()
Date: December 08, 2019 06:32PM

I've used rubbing alcohol with a little red food coloring in it for years.. works great.. lot cheaper than using Jack Daniels..smiling smiley

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Re: Head Chamber CCing
Posted by: chris ()
Date: December 08, 2019 06:33PM

Wagon Master Wrote:
-------------------------------------------------------
> I just cc'ed my 140 heads with the gasket register milled to the squish or quench pad and got 48 cc's sound close to what others have gotten?
>
> Thanks.



That seems a little high if the gasket step has been milled down all the way. Typically I’ve seen @42-43 cc (but there are many others who have done it and found different amounts).

'65 Monza 4 door
4 speed
110hp
Gardner, KS

Heart of America Corvair Owners Association

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Re: Head Chamber CCing
Posted by: vairmech ()
Date: December 09, 2019 04:05AM

Wagon Master Wrote:
-------------------------------------------------------
>I just cc'ed my 140 heads with the gasket register milled to the squish or quench pad and got 48 cc's sound close to what others have gotten?
>
> Thanks
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

That comes out to 9.5-1, sounds about right. My calcs were done using stock bore. .060 gives you 9.7.

In order to get the lower cc's you need to also mill the flat area down to the spark plug hole.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Head Chamber CCing
Posted by: Wagon Master ()
Date: December 09, 2019 05:33AM

Ken, that let's me know I'm in range. I went with a +.040 overbore and piston .010 below deck and got 9.379.

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Re: Head Chamber CCing
Posted by: jjohnsonjo ()
Date: December 09, 2019 07:29AM

Did you add the head gasket into your calculation?

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa


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