Ceramic coated headers and engine break in... - Team Camaro Tech
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post #1 of 7 (permalink) Old Sep 22nd, 13, 07:54 AM Thread Starter
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Jim
 
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Ceramic coated headers and engine break in...

Pulled my headers out of storage and installed the right side this morning.
When I pulled the left side out, it had a nice little bag with header bolts (already bought a set), gaskets (already bought a set) and some paperwork.

Reading through the paperwork, there was a page that said NOT to install the headers before break in, as the high temps created during the first 1/2hr of runtime on a new motor would potentially discolor the coating.

They also said to use RTV on the gaskets, but I've talked to other folks that say to not to use sealant...just bolt them up.

Which way should I go? I don't have the old cast iron headers that came off the motor...and would really like to not have to swap the headers out after engine startup, but at the same time, the HTCs look pretty good, and would like to keep them that way for at least a little while

Jim

Jim
Hanging on the Gulf Coast

1969 RS/SS, 383, 4spd, 373s, 12bolt, FatMat, Vintage Air - Super Red, and it's my first Camaro.
Engine pics http://http://www.camaros.net/forums/album.php?albumid=1937

Radiator pics http://http://www.camaros.net/forums/album.php?albumid=1929
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post #2 of 7 (permalink) Old Sep 22nd, 13, 08:17 AM
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David
 
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Re: Ceramic coated headers and engine break in...

I broke my motor in with them installed. My setup requires pulling the motor to remove headers.
Do a search on here for that topic.
The bottom line is getting a plenty rich AFR and getting timing set with enough advance ...both keep temps down. Getting timing in the ballpark isn't too tough since likely the first thing to tweak as soon as the motor runs.
The AFR adjustment depends upon your engine setup

68 coupe ,572,tko
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post #3 of 7 (permalink) Old Sep 22nd, 13, 09:44 AM
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Re: Ceramic coated headers and engine break in...

My engine builder came over and did the breakin on rebuilt motor after I installed everything into the car along with the Hooker ceramic coated 2457s. He said not to worry about the headers and he fired up the motor and had it run at 1800 rpm for about 15 mins then toned it down to 1000 rpm for the next 10 and down to 700 rpm for the last 5.

We could see the headers turn bluish after a few mins at 1800 rpm but when all was said and done and everything cooled off they looked great and have been ever since.

I've never used RTV on the header gaskets, I think the RTV will burn and stick pretty quick and if you have to take the headers off you'll be scraping the gaskets off for a couple of hours. Go with Percy's aluminum gaskets....costs a little more but headache free and re-usable.

67 Plain Jane being assembled with 427, 4 spd Muncie, 12 bolt rear with Mosers, 4 wheel discs
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post #4 of 7 (permalink) Old Sep 22nd, 13, 10:21 AM
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Re: Ceramic coated headers and engine break in...

No gasket sealer is required. Its is okay to break your engine in with the new headers. I have done three engines with new ceramic headers and they never discolored, etc. You should be fine.
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post #5 of 7 (permalink) Old Sep 22nd, 13, 06:10 PM Thread Starter
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Jim
 
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Re: Ceramic coated headers and engine break in...

Thanks guys. That makes things a lot easier.

Jim

Jim
Hanging on the Gulf Coast

1969 RS/SS, 383, 4spd, 373s, 12bolt, FatMat, Vintage Air - Super Red, and it's my first Camaro.
Engine pics http://http://www.camaros.net/forums/album.php?albumid=1937

Radiator pics http://http://www.camaros.net/forums/album.php?albumid=1929
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post #6 of 7 (permalink) Old Sep 24th, 13, 07:17 PM
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Re: Ceramic coated headers and engine break in...

My experience is a bit different.

Are you asking about *camshaft* breakin or engine breakin? I broke my cam in with freshly coated silver ceramic coating...it turned a dull gray. Didn't burn off and still protect/works, but not the bright 'chrome' it was. Reving an engine while the car is stopped...builds lots of heat.

If you are just running a new engine in and driving it around (ie roller camshaft)-much different. I would have no issue doing that-matter of fact that will be my next iteration in 2 months...

The bright finish ceramic does not have nearly the same heat tolerance as the plain black or gray shades...

Good luck.

1969 Nova SS 350
EFI 407/TKO600/4.11
11.43 at 121 MPH
http://temp.corvetteforum.net/c4/nog...NovaMain.shtml
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post #7 of 7 (permalink) Old Sep 24th, 13, 08:43 PM
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Re: Ceramic coated headers and engine break in...

After 4 years my ceramic coated Hookers have lost a little bit of their luster especially on where the tubes curve coming out of the head due to heat. I actually use chrome polish to bring them out to shine, but they'll lose luster eventually again.

A local Chevy heavy who's been around for 40 years hot rodding says it's better to buy the painted headers, run them for a few months then pull them and have them ceramic coated. He's saying the metal will have been heat treated and cured by that time and provides a better ceramic coat, I'm not sure it what he's saying is entirely making sense!

67 Plain Jane being assembled with 427, 4 spd Muncie, 12 bolt rear with Mosers, 4 wheel discs
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