Bad manifold gaskets

[alexiskai]

These seem to be just a sort of a flare around the edge of the gasket? Really hard to tell from the photo. The early '28 models came with six individual copper gaskets that did have true rings built into them, but no one makes those.

[alexiskai]

FWIW, I'm planning to outfit the phaeton with Remflex gaskets following the engine overhaul. These don't look stock at all, but they're very good at sealing leaks.
https://www.summitracing.com/parts/rfl-3040

[wwirz]

Originally Posted by Y-Blockhead

Has anyone tried the copper gaskets with the glands built in?MAC's seems to be the only vendor that carries them. https://www.macsautoparts.com/model-...8-24826-1.html

These did not work for me. I could not even get these gaskets over the studs on the engine block.
I used the gland rings and the copper gaskets. I also put a light smear of hi temp exhaust sealant on the faces of the gasket.
Once the engine started and ran for a while, I also checked the torque and re-torqued if necessary.

[dmaxweb]

Originally Posted by alexiskai

I'm confused. The manifold is cast iron, so the linear thermal expansion coefficient is 5.8. The rings are mild steel, so the coefficient is ~6.5-7.0. That's close enough that the expansion you'd get at normal exhaust temperatures is like going from a slip fit to an interference fit. Unless you're needing to drive your homemade rings in with a hammer, it doesn't seem like you'd need to worry about buckling due to expansion.

What about rings cut from 316SS tube (1.500" OD X 16GA (0.065"))? With a significantly higher coefficient than cast iron can they still be solid or is a gap needed for thermal expansion?

[dmaxweb]

Originally Posted by dmaxweb

What about rings cut from 316SS tube (1.500" OD X 16GA (0.065"))? With a significantly higher coefficient than cast iron can they still be solid or is a gap needed for thermal expansion?

Would it be better to use solid rings made from mild steel or cutting 304 stainless steel rings with a hacksaw to allow some thermal expansion?

[Nailhead Jeff]

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