<VV> Need some discussion on "Jet", high tech Ceramic coatings

[Jack Kean]

That's an interesting conclusion.. How were you able to determine that 
the bellows were not opening? I have been experiencing similar 
overheating problems (I live in Arlington Texas), but had not thought 
about those manifolds.I will be looking closer at that. Guess I will 
also be looking to trade my manifolds (clark's reproductions) for a set 
of uncoated ones if this proves out. Do you have a set of uncoated 
manifolds to install so you can evaluate the results? I've not noticed 
the wild temperature swings because I'm not driving this car daily. I'm 
just trying to sort it out. I also wondered if my fan belt was slipping 
because the engine has a spring loaded tensioner. Then there is the oil 
cooler bypass spring that must be 40+ years old. All potential 
contributors, but the exhaust manifolds sound very suspicious.

jack kean.

Bob Bauer wrote:
> Wht I am finding out is that they seem to insulate to well.  With the shrouds on, I can't get enough temperature to open the bellows.  As I run, the temperature starts to build to a point where I begin to overheat,  Temp's around 400  in a Monza  110 horse.  Then the temp drops sharply to about 300 then slowly climbs back to 400 then drops back to 300.  What I have been able to discover is that the coating insualtes so well, the bellows are not getting enough heat to cause them to open.  The motor begins to overheat, to a point where they do open, then as the temp drops, they close again allowing the heat to build up.  And so on.
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>   My purpose was to insulate the heat to keep it from radiating up into the motor, my goal was to help cool [reduce heat] but I am afarid I have gone to far.
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>   Bob Bauer
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> Jack Kean <jkean at sbcglobal.net> wrote:
>   Interesting. I purchased a car (140/4speed) which had the manifolds coated. I am curious. Why do you not like what you see?
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> jack kean
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> Bob Bauer wrote:   
> Has anyone on this list ever done any  Jet coatings.  Not the rattle can type but the high dollar,  high tech  Professional grade metal/ceramic coatings  on any Corvair parts.  I had some  exhaust manifolds done and I don't think I like what I see.   It seems they work too well insulating the heat.         Your thoughts!!!!         Bob Bauer       _______________________________________________  This message was sent by the VirtualVairs mailing list, all copyrights are the property  of the writer, please attribute properly. For help, mailto:vv-help at corvair.org  This list sponsored by the Corvair Society of America, http://www.corvair.org/  Post messages to: VirtualVairs at corvair.org  Change your options: http://www.vv.corvair.org/mailman/options/virtualvairs    _______________________________________________      
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