Two Head Questions For the Price of One

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TillieTheTouring
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First Name: William
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* REQUIRED* Type and Year of Model Ts owned: 1920 Touring. 1923 Touring, 1924 Pickup
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Two Head Questions For the Price of One

Post by TillieTheTouring » Tue Oct 28, 2025 6:24 pm

1) The head on my '20 has a casting mark of 'P' for Prus. So does my '24. My '23 has a casting mark of 'X'. Is there any significance to this mark? 2) The head on the '23 also features a copper outlet gasket at the top where the outlet goes to the radiator. It looks like Snyders and Langs only feature paper gaskets for this. What was it originally? Is copper preferable? Where might I find a copper outlet gasket?

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RajoRacer
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Re: Two Head Questions For the Price of One

Post by RajoRacer » Tue Oct 28, 2025 7:03 pm

Is the "X" steel or aluminum ? Copper clad gaskets were original - some of us still have a stash left !


big2bird
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Re: Two Head Questions For the Price of One

Post by big2bird » Tue Oct 28, 2025 7:32 pm

The water outlet gasket does not see pressure. Any decent gasket is fine.


Topic author
TillieTheTouring
Posts: 22
Joined: Mon Apr 15, 2024 10:41 am
First Name: William
Last Name: Naquin
* REQUIRED* Type and Year of Model Ts owned: 1920 Touring. 1923 Touring, 1924 Pickup
Location: Gloucester Virginia

Re: Two Head Questions For the Price of One

Post by TillieTheTouring » Tue Oct 28, 2025 8:12 pm

Rajo, I believe the head is cast iron. From what I was told about this car it has likely been on at least since the 70's and it may be a lot older. Markings include Made in USA and 'X' right where you would see a Z or a P. Could you be persuaded to part with a copper outlet gasket?

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RajoRacer
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Re: Two Head Questions For the Price of One

Post by RajoRacer » Tue Oct 28, 2025 9:45 pm

The "X" is most likely a foundry mark/designation. I'll send you a note.

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Steve Jelf
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Re: Two Head Questions For the Price of One

Post by Steve Jelf » Wed Oct 29, 2025 12:57 pm

For the water outlet and inlet gasket try making your own:
1 On the head or block, apply a layer of Ultra Black
2 On the outlet or inlet, smear grease;
3 Tighten the bolts enough to flatten the Ultra Black;
4 Let it set up and cure;
5 Tighten the bolts.

If you remove and reinstall those parts later, apply only new grease.

I mention Ultra Black by name because it's what I use. Other sealants may work.
The Right Stuff is the wrong stuff for me because I'm slow and it sets up too fast.
The inevitable often happens.
1915 Runabout
1923 Touring

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