Re: {Chrysler 300} 300K exhaust manifold gaskets

When the block and heads were made and had a nice smooth surface, gaskets were not required. The problem with gaskets is that most need to be re-torqued a few times as they shrink from the heat. I used to use them all the time, but even with re-torqueing, they still burned out. If the manifolds are flat and pit free, you can use a light coat of high temp silicone sealer, which is what I use now. My Imperial with 440 has been set up like that for 2 years now, and not a leak anywhere.

Don

Dumb question but why wouldn’t we use gaskets? For any exhaust interface? As long as they are good quality, and won’t be prone to leaking. I like the kind with graphite crush. I’ve also seen where some folks use hi-temp permatex to coat the gaskets.

I use 7/16-14 stainless bolts and locknuts for the manifold-to-pipe connections. Not saying they’re better, but hopefully easier to remove them in the future than the (usually) horribly rusted carbon steel bolts and nuts you often run into.

Respectfully

dave

Sent from my iPhone

On Oct 29, 2021, at 4:09 PM, Frank Newhouse <newhousef@xxxxxxxxx> wrote:

On the same subject but a different car. 1961 300G Cross Ram with two fours.
Exhaust manifold gaskets or no gaskets

Thanks

Frank Newhouse

1961 Chrysler 300G

On Fri, Oct 29, 2021, 3:04 PM <apozdol@xxxxxxxxxxx> wrote:

So I had some cracking noises develop at start up when cold and sure enough, I found the manifold nuts barley tight both sides, and no gaskets. Somebody was playing here. Manual says 30 ft/lbs torque for the nuts.

I searched the parts book and it is a little vague to me. Do the single carb 360HP engines use exhaust manifold gaskets, or not? The parts book calls for them for the ram and hemi engines.

Allan

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