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#1
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Exhaust manifold prep
Finally putting my original engine back together. Exhaust manifolds (cast logs) have light surface rust and in nice shape. What is a good prep to keep the manifolds looking good. Mostly stock. Paint? Dressings? Looking to keep clean cast iron look. Easy to do while engine is out . Any suggestions welcome
Thanks |
#2
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Eastwood high temp cast iron paint inside as much as you can get also!
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#3
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POR-15 cast iron grey manifold paint.
A little pint can does at least a few pairs of manifolds, brush on a couple coats on your bead pasted manifolds and it holds up nicely for many years and miles.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
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#4
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I'll second POR-15 cast paint.
Brushes on easy and will do several sets. I've had mine done for several years now with 30,000 miles and they still look new |
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#5
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I agree. Por 15 cast iron grey manifold paint is the way to go. A half pint is way more than needed.
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#6
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Still learnin.
Tried Hi-Temp Clear; looks new until morning condensation enables rust pits to bloom. Tried Hi-Temp White; looks new until morning condensation enables rust pits to bloom. This go: Hi-Temp primer ( water based spraycan ) with Hi-Temp White. Wishing for a clear Satin glasscoat. Hello Corning, Schott... |
#7
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Eastwood used to sell a stainless steel paint that worked really well for me, but I think they discontinued it.
Something I've never tried but think would work pretty well is stove polish - it's meant for old fashioned wood stoves. You just wipe it on with a rag and buff it. You can get it at fireplace stores, Ace Hardware, or of course off Amazon. A quick check online shows you can get a tube of the stuff for under $10.00. |
#8
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I heat cast iron manifolds in the grill to remove all moisture before painting to improve adhesion. You'd be surprised how much moisture comes out.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
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#9
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I agree, heating them some for a length of time at a low temp (@ 150F), then coat/paint when barely warm to the touch.
I bead blasted, then chemically etched the long branch I did for a friend, coated with Eastwood stainless steel paint, then hit them with some as-cast manifold paint. Those lasted years and many miles. I would paint blocks and iron heads the same way basically. On the heads, I would just coat the tops of the exhaust ports with stainless steel paint, then paint as usual with engine paint. Made the heads last a long time without the typical exhaust port burn-off. Blocks I would etch and spend 45min or so with a heat gun drying it. (blocks & heads are a pain to mask off) They still make a high temp exhaust coating, but it's not the stainless steel stuff they used to have: https://www.eastwood.com/satin-black...p-coating.html That's rated to 1400F, which I believe is less than what the stainless steel paint was. Some reason I remember it was up to 2000F, but a little foggy on that. They do now offer a product, ZyCoat by Zybar, which they call a 'thermal barrier'. I haven't tried it, but it says it's good to 2000F. https://www.eastwood.com/zycoat-zyba...4oz-13004.html Not cheap, that's for sure. .
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. 1970 GTO Judge Tribute Pro-Tour Project 535 IA2 http://forums.maxperformanceinc.com/...d.php?t=760624 1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car https://forums.maxperformanceinc.com...ght=procharger Theme Song: http://www.youtube.com/watch?v=7zKAS...ature=youtu.be |
#10
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I bead blasted mine and painted them with stove/furnace paint. That was 10 years and many miles ago and they are still perfect. Kind of a dark gray color, darker than cast,, though.
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Jeff |
#11
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I've used the POR-15 both ways, with and without an oven. They all still look good to this day.
I do glass bead all the manifolds before coating however. Another tip using the POR-15, I've used it on the Pontiac cylinder heads above the exhaust ports. Then paint the engine desired color. I found I get no paint discoloration with the POR-15 beneath it. When I freshened the engine in the bird several years ago now, I did this process and then painted the correct metallic blue. 30,000 miles and the heads still look good today. I also used the POR-15 on the exhaust cross over for the RAIV intake manifold, still looks like the day I coated it. |
#12
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I used the Eastwood stainless steel spray also with great results. Still on and looks great
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#13
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Quote:
Tiger torch? |
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