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post #1 of (permalink) Old 06-18-2003, 12:40 PM Thread Starter
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Preping and Painting a rusty exhaust manifold

I have a rusted, but very solid (no cracks) and functional 4.0 exhaust manifold that I would like to clean up and paint prior to my 4.0 head swap. My question is what products should I use to prime, and ultimately paint the manifold that will last. Obviously I will knock off the loose rust and clean but is there anything that you guys have used that I should be considering?

Thanks for your comments.
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post #2 of (permalink) Old 06-18-2003, 01:09 PM
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Re: Preping and Painting a rusty exhaust manifold

Eastwood makes several paints that I've found to be very high quality products.....they even sell Hammerite
http://www.eastwoodco.com/
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post #3 of (permalink) Old 06-18-2003, 02:18 PM
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Re: Preping and Painting a rusty exhaust manifold

I sandblasted mine and used BBQ grill rattle can paint from Wallyworld.
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post #4 of (permalink) Old 06-18-2003, 02:22 PM
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Re: Preping and Painting a rusty exhaust manifold

1. Rick, I've been toying with that idea after refrubing the BBQ last week,
2. As BBQ paint is[*]Cheap [*]Easy to use [*]High Temp
3. How's it been holding up?
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post #5 of (permalink) Old 06-18-2003, 03:41 PM
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Re: Preping and Painting a rusty exhaust manifold

It's only been 2 months, but it's holding up just fine. It's not a show piece, but it looks a lot better than it used to.
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post #6 of (permalink) Old 06-18-2003, 05:31 PM
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Re: Preping and Painting a rusty exhaust manifold

Here's a redneck trick that I have used to clean badly rusted metal. Coke/Pepsi will eat rust for lunch. Buy a couple two liter bottles and submerge the piece to clean in a bucket of the soda. Give it about two days and it should be ready for paint after a good rinsing!
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post #7 of (permalink) Old 06-19-2003, 01:16 AM
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Re: Preping and Painting a rusty exhaust manifold

I've used Muratic acid in a 1 to 4 solution and a solution of caustic soda (Drano) with good results. Both will remove rust but the Drano seems to work better for greasy or carboned up parts. I'll have to try that soda pop trick next time, gotta try everything once.
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post #8 of (permalink) Old 06-19-2003, 11:42 AM
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Re: Preping and Painting a rusty exhaust manifold

I just re-did a 258 exhaust manifold, here is how:

1) if it is at all used, have a shop re-surface the flange (should be about $20) - this REALLY helps getting a good seal.

2) wire brush it, or sandblast it, or coke soak it.

3) spray on a degreaser, let it sit 5 mins, spray again, scrub, rinse, dry (VERY important to be clean and dry)

4) I used POR15 1400F paint. I got it in color of stock cast iron gray. Final cure happens when you start it up 1st time. put in on with a disposable foam brush. Did 2 coats, results are great. It soaks into the metal.

So far so good. Looks great, and is made to last.

I don't like the BBQ paints so much because the paint is thinner than stuff made for manifolds. It doesn't last as long either (my personal exp.).

MS
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post #9 of (permalink) Old 06-19-2003, 11:48 AM
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Re: Preping and Painting a rusty exhaust manifold

</font><blockquote><font class="small">In reply to:</font><hr />
Coke/Pepsi will eat rust for lunch.

[/ QUOTE ]1. You're old when you remember...
2. Your parents or teachers suspending a 16 penny nail in a bottle of Coke...
3. (you remember bottles?)...
4. And telling you to watch how long it took to dissolve the nail.
5. Then the claim was that it did the same thing to your stomach.
6. I think it was at least 25 years before I ever had a Coke!

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post #10 of (permalink) Old 06-19-2003, 12:44 PM
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Re: Preping and Painting a rusty exhaust manifold

This is not meant to be helpful but your post reminded me of something a co-worker did after rebuilding his motor. Painted his headers with yellow laquer and drove it to work to show off his latest creation. Needless to say the motor was a smoky burning mess when he got here. Just thought I'd share that image as it is something that I will probably never forget and was a GREAT laugh!

Scott
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