Repaint of cylinder baffle tin ?

[irobertson]

I'm repainting the tin from between my cylinders and I'm wondering if a regular acrylic enamel would do, or should I be using a "high heat" type paint for these?

[jbell959]

You will need a high heat paint. Regular paint will not last. Best option is powder coat but it's a little expensive.

[Lapkritis]

Powdercoat.

[keynsham1]

Why not buy new ones? I was surprised how cheap they are and come ready painted! Probably cheaper than getting existing ones coated!!

[irobertson]

Yeah, powdercoat does seem like the best idea.
Thanks guys.

keysham1, unfortunately I already bought these used ones (before I realized how cheap they are) to replace my rotted out ones.

[K Sykes]

Powdercoat the engine tin at the same time.

[Porshaah]

CTC has VHT ceramic spray paint which appears to be over kill for your application, being rated at 2000 degrees, so it should work.

[toddu]

Zinc plate?

[Lapkritis]

Originally Posted by toddu

Zinc plate?

... won't protect as well as powdercoat. People seem to zinc plate everything else on these engines though so I imagine someone would endorse the idea.

[KTL]

Buying new will work for a while and then they'll rust like the used ones. I agree powdercoat would work just fine.

Or you could use a pure zinc galvanizing paint primer before high temp painting. I have used LPS zinc on exhaust parts and it works fantastico.

http://www.lpslabs.com/product-details/613

Once you get some heat on the painted parts, it hardens to a very tough surface. I painted some header extension pipes with it and they withstood hard use on a track car.



They're a little dirty in the picture but you can see the LPS paint lasted MUCH better than the crappy "ceramic" paint that Chinese OBX headers came with. I bought the headers new and the paint started coming off right away. I bought the extensions used, wire-wheeled them to remove most of the surface rust and painted with only LPS. Held up fantastic.

[Porshaah]

It appears the ceramic paint on the headers next to the extensions has held up well? I'm not sure if the lower temperature further away from the manifold has anything to do with this or maybe the headers were not prepped as good as surface you created by wire-wheeling the extensions?

[KTL]

There's more pictures here

OBX Shorty Headers, Extensions, M&K Shorties

You can see in one of the pictures the header collector is losing the paint too. Rust coming thru very easily. Definitely get what you pay for with the OBX plain steel headers. They fit/work OK but their painted finish is very temporary

[HawgRyder]

DIY alternative...make new ones out of stainless steel!
I did mine that way....my lazyness got the better of me...never have to look at them again.
Bob

[mazing3]

I just used BBQ grill hi temp paint. Bead blasted them first and then sprayed them. Didn't feel like waiting for powder coat turn around time and you can't really see much of them when they are installed any way. Held up fine. I did powder coat all of my engine tin, fan shroud, etc. just didn't see the point on the air baffles.

[Henry Schmidt]

Originally Posted by toddu

Zinc plate?

The truth is zinc works just fine. Over the years we've used zinc plating, powder coating, Duracoat and plain old Krylon with little difference to base a definitive answer on.
We zinc coat all of the tin as a base for the items we paint.
Generally we Duracoat the tin on concours restorations (to simulate the factory finish) and on hot rod engines we leave the cooling tin gold zinc and powder coat the rest.
Although Duracoat is expensive, as the name suggests, it's extremely durable and offer a genuine factory look for items like sheet metal, valve covers and throttle bodies.

DuraCoat Firearm Finishes

[toddu]

I went with Zinc. Was taking a bunch of fasteners anyway, and it's 1 price so I figured I might as well. I had the rest of the tins powder coated @ Calico.




Todd

[Neil '67 911S]

Originally Posted by Henry Schmidt

Generally we Duracoat the tin on concours restorations (to simulate the factory finish) and on hot rod engines we leave the cooling tin gold zinc and powder coat the rest.
DuraCoat Firearm Finishes

Have any of your customers ordered the camo paint option?

[Henry Schmidt]

Originally Posted by Neil '67 911S

Have any of your customers ordered the camo paint option?

I did an SL8 to G36 conversion in camo for a customer but that's a topic for another forum.

BTW: since is the NSA is watching, these are types of transmissions.

[Jeff Alton]

We media blast and powder coat. Been very happy with the results.

[irobertson]

The DuraCoat looks interesting.
I need to refinish my axles as well, so that sounds like a good option there too.