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Old 12-17-2005, 09:00 AM
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Curing ceramic coated headers

I'm nearing the end of a complete frame resto on my '62 Corvette. I bought a set of Hedman cermaic coated headers. The instructions warn about breaking in a new engine with the headers. My engine isn't new, but do the headers need a few cycles of warming up and cooling down before cured? My guess is to bring the engine up to temp, shut it off., cool completely down and repeat a few times. Is this correct?

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Old 12-17-2005, 02:04 PM
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Quote:
Originally Posted by GCD1962
I'm nearing the end of a complete frame resto on my '62 Corvette. I bought a set of Hedman cermaic coated headers. The instructions warn about breaking in a new engine with the headers. My engine isn't new, but do the headers need a few cycles of warming up and cooling down before cured? My guess is to bring the engine up to temp, shut it off., cool completely down and repeat a few times. Is this correct?
i don't know how you break in ceramic headers....however i do know how you break in new cams....20 minutes at an rpm over 2500.....so i think your thoughts on "curing" them may not be far off...
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Old 12-17-2005, 03:13 PM
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The ceramic coating is oven cured at the factory. It is ready to run. Only problem that could arise with an new engine is if you are running too hot and burn the coating (headers running red hot), which would damage any header.
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Old 12-17-2005, 07:46 PM
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Quote:
Originally Posted by willys36@aol.com
The ceramic coating is oven cured at the factory. It is ready to run. Only problem that could arise with an new engine is if you are running too hot and burn the coating (headers running red hot), which would damage any header.
The instructions in the box look like it was written by a kid. It only mentions not to run the headers when breaking in a new engine. It said nothing about breaking in otherwise, nor what temp to run the engine at initially. I think breaking in a new engine you run it for 20 minutes or more at high rpm which could create excess heat.

I like your Willys, looks a lot like the one that Jack Merkel used to run in A/GS back in the mid 60s
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Old 12-17-2005, 09:46 PM
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That's right, startup is tough on any exhaust header. The ceramic is great stuff but nothing stands up to red heat. Otherwise that stuff cat take everything you can throw at it.

Thanx for the kudos on my car. I bought it as a sophomore circa '66 with a dream of building a Merkel/K.S. Pittman/Altizer finders Kibler type gasser street rod. Took 30 years to get it done but it is the love of my life (as far as cars go!!).
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Old 12-18-2005, 10:36 AM
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I bought some Sanderson Cast Block Hugger headers with the ceramic coating for my 49 Hudson w/454 and they came with the same warning about using when breaking in a new motor.

If you are running raw gas through the engine (maybe too much fuel, a bad plug/wire or mis-wired, and/or timing) this can produce and enourmous amount of heat as the gas gets ignited inside the exhaust. Also new motors being broken in tend to run more heat during startup.

I plan on just making sure the thing sounds right (not missing and popping) adjust the timing and keep a close look at the temp and exhaust and go for it!

It's only money!...
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