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Debbie Harris's 1969 Grand Prix

2022 September
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[Request] How to clean exhaust manifold


havoc1482
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So, the manifold on my SA is a one piece exhaust/intake. Clearly the exhaust portion is ugly looking. Any tips on how to clean it up? I hear you can do a combo of wire brushing and soaking and then baking a high-temp paint onto it.



I don't necessarily have to do this, I just want to freshen up the engine. I know the high heat will be a factor in what I can actually do to this piece.


1467191_10202092337644599_387095301_n.jp


1610108_10202092337844604_1147555585_n.j



I also just noticed that it looks like somebody broke it once and welded it back together.


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Oven cleaner works well. Spray nine works well as well and is the stuff that I use for my engines. If you want clean the rust a wire wheel and a grinder just hold on tight. If you want to smooth it out use a dremel tool and a small grinding stone or abrasive drum. Take your time and it will look good. If you are baking it on do not use Mom's oven or she will just kill you. The baking leaves a smell in the oven that gets into the food.


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Use a good exhaust paint. Suggestion, Eastwood. The cheap Engine spray paint works well on the motor, but no so much on exhaust manifolds.


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I used POR15 exhaust paint and it has held up damn good.


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  • 3 weeks later...

Havoc - after you've cleaned the manifold of the dirt, oil, and grime, get yourself a large bucket and fill it with something like Evapo-Rust or Eastwood Rust Converter and put the manifold in the solution. It may need to soak over night or 24 hours depending on how heavily rusted the manifold is. It will get into the cracks, crevices, and tiny pits of the manifold and dissolve or convert the rust into an inert, paintable surface. Once you've soaked the entire manifold completely, wash it thoroughly and dry it. Then you can prep and paint it. You definitely want to use a high temperature etching primer and hi-temp engine paint. Take your time and it will look great.


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Thanks for the advice! I did actually finish this. I cleaned and soaked it and after It dried I sprayed it with a high-heat (2000F) black paint. Then followed the baking instructions for when it is already mounted on the engine. Looks much better than what I had before! I should have done it in a different color, but oh well lol.


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Honestly, that is how we all learn. There is nothing wrong with that either.


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In hindsight, I think my youth had something to do with my haste, but It doesn't mean I haven't learned for future projects. The next item on my list is a Farmall C/Super C :). I plan on keeping my Phoenix forever haha



7857038_orig.jpg


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Post the finished pics...I love before and after pics.

Before:

1610108_10202092337844604_1147555585_n.j

After!

1779336_10202249351449846_1463737641_n.j

1798567_10202249351689852_1981835119_n.j

What do you guys think?? Not bad for a first time.

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i was gonna say if you can get your hands on some of this loctite natural blue degreaser it works awesome. we use it at work and it strips the grease and crap from parts in no time.


http://www.amazon.com/Loctite-Natural-Biodegradable-Cleaner-Degreaser/dp/B002A0FBLG


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i was gonna say if you can get your hands on some of this loctite natural blue degreaser it works awesome. we use it at work and it strips the grease and crap from parts in no time.

http://www.amazon.com/Loctite-Natural-Biodegradable-Cleaner-Degreaser/dp/B002A0FBLG

Good to know. I'm still waiting for that weld on the right to eventually crack. I find it funny how the air intake pipe covers it perfectly haha

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Looks good Havoc. What paint and primer did you use?


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Good choice. I think VHT makes an etching primer too. You did use a primer didn't you? Also, did you clean it with any oil/wax/degreaser on the manifold before you painted it? I just would not want to see the paint flake off this nicely cleaned up manifold in the near future.


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  • 4 months later...

Starting to flake a little up top, possibly from water that gets stuck in the pits and then evaps off in the high heat. Oh well. Still looks good.


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F cleaning them bitches slap some headers and a Flowmaster on it!!!!!

lol

Sent from my iPhone using Tapatalk

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Flowmasters are for pimps and sissys Jedi! Real men run open exhaust! :lol2:


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