[Spaceman Spiff]

Any tips or tricks to prevent the paint from burning off the exhaust ports on the heads?
I was thinking using 1500* bbq paint first, then paint with hi temp engine color.

[Stuart]

I've had some luck putting on a light coat of high temp silver paint first, then the Pontiac blue - don't put it on too heavy either, just enough to cover. That slowed the process but eventually it did start to burn. The silver coat underneath does help camouflage the damage.

[steve25]

The above is the way to do it and since the high temp stays there atleast no rust takes place so you can just touch it up with color coat again.

[Formulajones]

https://por15.com/products/high-temp

I've used this on several Pontiac engines. I use the little pint cans and just brush it on the exhaust ports, then paint over.

On mine I've got about 3 years and over 25k miles on it and still looks good.

I also buy the cast grey and brush it on the RA exhaust manifolds and they still look like the day I applied it.

[NeighborsComplaint]

I've tried the silver heat paint and misted on silver blue engine paint and the engine paint turned brown immediately. I ran with Eastwood Silver exhaust manifold coating alone but was never happy with the look.

Most recently, I bought VHT Aluminum and VHT Blue aerosol cans and mixed the blue and silver together and sprayed with an airbrush. It dries a little flatter looking than the engine paint but holds up great. I followed the heat and cool curing cycle specified on the can after painting.

[Greg Reid]

I've had pretty good luck using the method Stuart described. Light mist coats of silver topped with color.

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[Vid]

My hack is just keeping a can of the Duplicolor engine paint handy with my other detailing supplies and giving the exhaust ports a little touch up when I know the engine will be on display at a car show or prior to a potential buyer showing up, lol


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[Vid]

Quick question that popped into mind since we’re on the topic of engine paint. With aluminum heads, does the paint tend to burn off at the exhaust ports like on the iron heads or does it stay looking good? I just ordered a pair of 61529 E heads and I pondered for a moment if I’m going to paint or not paint.

I’ve got all these brand new pretty aluminum parts collected for my build (heads, intake, timing cover, water pump) and I want them to stay looking good and easy to clean. I do love the look of Pontiac silver/blue under the hood but maybe “au naturale” is easier in the long run? Thoughts?


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[65gto69]

Originally Posted by Vid

Quick question that popped into mind since we’re on the topic of engine paint. With aluminum heads, does the paint tend to burn off at the exhaust ports like on the iron heads or does it stay looking good? I just ordered a pair of 61529 E heads and I pondered for a moment if I’m going to paint or not paint.

I’ve got all these brand new pretty aluminum parts collected for my build (heads, intake, timing cover, water pump) and I want them to stay looking good and easy to clean. I do love the look of Pontiac silver/blue under the hood but maybe “au naturale” is easier in the long run? Thoughts?


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When I had my edelbrock heads painted pontiac blue, the color did not change or burn off the exhaust ports the whole time I had them on the car.

Mark

[Vid]

Originally Posted by 65gto69

When I had my edelbrock heads painted pontiac blue, the color did not change or burn off the exhaust ports the whole time I had them on the car.

Mark

Thanks Mark!


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[Greg Reid]

Just took these shots of what mine look like using the high temp silver under blue mist. With the amount I drive the car l only have to touch them up every couple years or so. Probably have six or seven hours I would guess on these.

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[geeteeohguy]

Burnt paint at the ports is a way of telling that the car is actually used as a car. It's a badge of honor, IMO.

[Greg Reid]

Originally Posted by geeteeohguy

Burnt paint at the ports is a way of telling that the car is actually used as a car. It's a badge of honor, IMO.

As you can tell, that's my philosophy on exhaust manifolds..lol

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[Spaceman Spiff]

Thanks for the replies, everyone.

[steve25]

I have never tried this out yet, but this should work better then the high heat Aluminum topped with the blue, especially if the heads are stripped down and the exh runners glass beaded.
I plan on getting some of the high temp barrior coating that Tech Line sells ( I think there Pro-2 kit ) ) ) that you can apply yourself to valves and using that first on the exh ports on the inside ( at least the roof and then on the outside before the color top coat.