Point Reduction for Ceramic Coated Exhaust Manifolds

[Paul C.]

I am having my 71 lt-1 motor rebuild and the engine builder suggested having the exhaust manifolds ceramic coated. Two reasons were keep the engine bay cooler--many reasons why that's good and to keep the exhaust manifolds looking new. How much of a point reduction if I have this done.

[Harmon C.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

At least 20% of the originality points for finish on that item.

[David H.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

Perhaps 40% - Finish and Date? How thick is this stuff?

[Gene M.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

Perhaps 40% - Finish and Date? How thick is this stuff?

The 40% sounds about right since there should be no finish and the cast iron texture is not visible. Follow the CDCIF guidelines. If the date and casting numbers are questionable even more loss. I do not recommend destroying the originality if it is not reversible.

[Gary B.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

Is a ceramic coating different than what Jerry MeNeish uses? I think some people on the DB have had Jerry treat their exhaust manifolds, and those people might have an idea of what the typical judging deduct is for that treatment.

Gary

[Tracy C.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

I am having my 71 lt-1 motor rebuild and the engine builder suggested having the exhaust manifolds ceramic coated. Two reasons were keep the engine bay cooler--many reasons why that's good and to keep the exhaust manifolds looking new. How much of a point reduction if I have this done.

Assuming you have correct unpitted manifolds to begin with you should only lose points for the finish. I doubt the date or casting numbers will be obliterated by the coating. Mine were not when I had them coated by "Jet Hot".

There are 22 originality points assigned to "Exhaust manifolds, fasteners & locks" These 22 points are to be divided across all 3 line items and I would probably give the manifolds 20 points and the fasteners & locks the remaining 2 points.

Per CDCIF quidelines, 20% of the originality score applies to finish ("F" in CDCIF)

20% of 20 points = 4 point deduction for finish.

The flip side is do not coat them and lose a few points for surface rust in the condition column. Because there are 18 points allowed for condition, you could easily lose the same 4 points for rusty manifolds.

tc

[Paul C.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

Has anyone had their exhaust manifolds reskinned by Jerry McNeish? Looks great and original?

[Gary B.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

Has anyone had their exhaust manifolds reskinned by Jerry McNeish? Looks great and original?

Paul,

John Hinckley has manifolds coated by Jerry. It looks great, but it does not look original.

Gary

[King M.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

image.jpgimage.jpgI had jerry do mne. The white one is how you get them back from him. He supplies the paint and you paint them. This is how they look after baking. I like the looks hope they last!

[Gary B.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

King,

Is the white stuff ceramic?

Gary

[King M.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

Beats me. It is jerry mcniesh's coating that he does. For some reason i am thinking it is a sprayed on aluminum coating but don't quote me on that

[Larry E.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

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Has anyone had their exhaust manifolds reskinned by Jerry McNeish? Looks great and original?

Have had Jerry do mine for a couple of cars. AFAIK his process is not
"Ceramic Coated." They look good as picture shows and look very close to the original "look".
For longevity they are the way to go.IMHO Larry

[Joe R.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

Beats me. It is jerry mcniesh's coating that he does. For some reason i am thinking it is a sprayed on aluminum coating but don't quote me on that

King,

Yes, it's aluminum. John Hinckley has posted pictures of his done by Jerry ten years ago (I believe it was 10), still look great! I had mine done too. I think they look fantastic and will never rust on the outside!

Joe

[John H.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

King,

Yes, it's aluminum. John Hinckley has posted pictures of his done by Jerry ten years ago (I believe it was 10), still look great! I had mine done too. I think they look fantastic and will never rust on the outside!

Joe

After cleaning and bead-blasting, Jerry plasma-sprays them with molten aluminum to a .005" thickness - this creates a barrier that bonds to the iron and prevents moisture from ever reaching the cast iron surface, eliminating rusting. Then you paint them with Seymour Hi-Temp "Cast-Blast" and never touch them again. My '69 Z/28 manifolds were done 13 years ago.


LHexhman.JPGRHexhman.JPG

[Roger G.]

Re: Point Reduction for Ceramic Coated Exhaust Manifolds

I am having my 71 lt-1 motor rebuild and the engine builder suggested having the exhaust manifolds ceramic coated. Two reasons were keep the engine bay cooler--many reasons why that's good and to keep the exhaust manifolds looking new. How much of a point reduction if I have this done.

There are differences of opinion on whether or not the ceramic drops temps. The application people certainly say it does. I think the primary benefit is cosmetic. For me it was a no brainer. I had Jerry do mine.