Jet Hot Coating Exhaust Manifold

I'm considering sending my exhaust manifold to Jet-Hot. I understand they do all the surface prep and then (of course) coat it. In my correspondance w/ them I've asked if they blast and coat the flange surface (where it mates w/ the cylinder head) and the threaded studs. They said yes they do unless the customer requests them not to.

Does it make sense to have them coat the whole thing or protect these items? I understand the coating thickness is ~0.002".

Thanks!

here's how mine came out. The new studs went in by my fingers, so the coating did not interfere.

I am in close to sending off a header.

make sure you can find a box.

the coating should not affect threads.

I am, however, rebelling at the cost of finding a box for the header (larger than the manifold) and so I am looking for an SF Bay Area (drive to, drop off) source. I think there are 1 or two.

i looked at the stuff to do it yourself, but the cleaning processes required are more than i could do.

I wonder about benefits for intake manifold as well....

Funny thing, I never considered removing the studs. I take they are just threaded studs and to use the double-nut approach to remove them. Something tells me it may be better to leave well enough alone though...

Any problem with leaving them in and having them coated along w/ the rest?

My studs were a mess, and even using a welding torch, two of them broke off and had to be drilled out. New studs are cheap. Brass nuts, too.

This is what the Peco looks like coated. I had this done locally.

New studs, and brass nuts, are great!! Removing old studs, from and ex manifold, can be enough to send one to the looney bin.

Jimmy - Of course you know this is all your fault! If those carbs didn't look so great, the manifold wouldn't look so tacky in comparison!

LOL Paul, I just wanted you to run well!!

Paul,

I did my manifold with Dupli-color hi heat aluminum. Still looks nice and shiney after about 500 miles 4 months. Changed three studs and wire brushed it ( never again with the wire brush).

Not sure how long it will last but it does still look like I just put it on.

I have had pretty good luck with the VHT FlameProof flat aluminum color (from O'Reilly's). Follow the instructions, and it has held up very well. It is a silica/ceramic coating that has to be correctly cured.

I sent my manifold to Jet-Hot for coating as well. I removed the studs first and put new ones on when it came back. I went with the black color as I felt it would end up lasting longer and hiding any oil drips or spills. The temperature drop is noteable on the HIF-4 carbs, however I did not do any readings with one of those little laser things. The whole thing ran about $120 or so when it was done. If I had it to do over again I would find a cast iron manifold to send for coating with fewer pits as those are still visable vs. my old one which had none.

The coating of the flange faces should not be an issue.

Do pull the studs before sending it off though and trial fit new ones before it goes out the door. It would be a shame to have to replace a broken one at some point once the coating was done. Chucking the thing up in a vise and/or heating it to get the broken part out would certainly mess up the new coating.

Remember to use the tall brass nuts and hardened or stainless flat washers that were OEM when putting it back on the car

Jack

I had both my intake and exhaust manifolds jet coated, they turned out incredible! I pulled the studs before I sent them off. Also, it's easy to run a tap through the holes when you get them back. I didn't have them coat the inside of my intake manifold as I has Sean Brown port match and polish it. I think they turned out great! The exhaust temps are way down and you can almost touch the header after you turn it off.

JimmyHilton Wrote:

John, what type and color paint did you use on your engine?? Looks like what I'll need for my C. I used Capp's in Fresno for my ceramic coating of the exaust manifolds. They do great work.

Swamperca Wrote: