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08-15-2021, 08:54 AM | #1 |
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Join Date: Sep 2016
Location: Raleigh, NC
Posts: 40
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exhaust bowl crack/leakage
I have an 8BA block that has had previous exhaust bowl crack repair by pinning. I performed a pressure test on the water jackets and bubble checked for leaks. I found some small weepage leaks at the sites of the pin jobs in cylinders 6 & 7.
I tried to read all the posts on crack repair here and it seems Sodium Silicate comes up quite often. Would this work for sealing up the seepage in the exhaust bowls? Any advice appreciated. Thanks |
08-23-2021, 07:15 AM | #2 |
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Location: Raleigh, NC
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Re: exhaust bowl crack/leakage
One more time around. Anyone?
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08-23-2021, 08:24 AM | #3 |
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Join Date: May 2010
Location: Plano, Texas
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Re: exhaust bowl crack/leakage
I'm no expert on this but I've heard that sodium silicate repairs are used only on water jacket cracks. Check with Richard at Antique Engine Rebuilding in Skokie Illinois. He only works on Model A engines but could answer your question on the sodium silicate process.
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08-23-2021, 08:48 AM | #4 |
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Join Date: Jul 2010
Location: Yorba Linda, CA
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Re: exhaust bowl crack/leakage
Used these products on my 8BA. Ceramic / silica based product.
https://www.amazon.com/Irontite-Thor...99359825&psc=1 https://www.amazon.com/Irontite-All-...18738641&psc=1
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Henry Ford designed the flathead without the aid of a computer. |
08-23-2021, 09:37 PM | #5 | |
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Join Date: Dec 2010
Location: East Coast in CT
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Re: exhaust bowl crack/leakage
Quote:
Every type of sealer sold contains sodium silicate in various amounts the difference's between the brands sold are simply how much water is added and what coloring has been added to the water. The best way to seal the leaking pin job would be using the sodium silicate non diluted. I find it on ebay usually I buy the one gallon container size. I find it works best when there's only water in the cooling system. Ronnieroadster
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I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH |
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08-24-2021, 05:03 PM | #6 |
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Location: Raleigh, NC
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Re: exhaust bowl crack/leakage
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08-25-2021, 08:27 PM | #7 | |
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Join Date: Dec 2010
Location: East Coast in CT
Posts: 1,529
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Re: exhaust bowl crack/leakage
Quote:
You may be overthinking this. The exhaust is exiting at various pressure pulses unlike the cooling system which is working under a constant pressure. I do know of a few individuals who had water flowing out their exhaust pipe due to crack issues in there flathead blocks. They all experienced complete sealing using the Sodium Silicate. At the time they purchased it at the local drug store since its also a food preservative also know as water glass. Ronnieroadster
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I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH |
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08-26-2021, 10:58 AM | #8 |
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Join Date: Sep 2016
Location: Raleigh, NC
Posts: 40
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Re: exhaust bowl crack/leakage
Thanks Ronnieroadster, I really appreciate your real world knowledge and help.
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