Who puts new Porcelain on exhaust manifolds these days ?

[californiamilleghia]

Hi , are there any companies  firing new Porcelain on exhaust manifolds and other things ?

 

I assume they have to sand blast off the old Porcelain , 

 

Thanks for your help

[Mark Shaw]

Coating Exhaust Manifolds (jcmmachineandcoatings.com)

 

[JACK M]

I think it's easy to find ceramic coating, Porcelain may be difficult.

This was discussed a few years ago if I recall.

[yachtflame]

Try Prairie Auto Porcelain
they did my 1930 LaSalle a few years ago.

[Buick35]

I wonder if powder coating would work since it has to oven treated.

[Stude Light]

Prairie Auto Porcelain and Independence Porcelain are two of the better ones. I had my 1939 LaSalle exhaust manifolds done as that is what was the original coating. They blasted the manifolds clean, then put them through the porcelain bonding process which, by the way, was developed and patented by David Buick and made him a lot of money and allowed him to follow his dream of building engine….but I digress. The manifolds came out great until I started driving and it failed in several areas. My understanding is that porcelain over aged cast iron does not hold up near as well as over virgin cast iron. 
 

I ended up using ceramic coating by Jet-Hot. It has held up great and is very durable as compared to porcelain. The best sheen you can get with ceramic coating is a satin…not quite as nice as glossy porcelain but it lasts.

 

No, you can’t use powder coating due to the high temperatures as it will just melt off.

Scott

Edited December 1, 2021 by Stude Light (see edit history)

[Stude Light]

Video showing the porcelain on the manifolds before it began failing before the first 100 miles

 

Photo after the porcelain started to fail

 

Video showing the ceramic coating

 

You can see the difference in surface finish and sheen (not quite as pretty as new porcelain) but I'm quite happy with the ceramic as I have a few thousand miles on that without any issue.

[alsancle]

My personal experience is that porcelain will never stick if you’re going to drive the car at all. I think there are some other choices, like maybe jet coat, that would be more durable overtime.

[Restorer32]

But there is nothing that looks like porcelain other than porcelain.