2 piece valves

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GG Gregory
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2 piece valves

Post by GG Gregory » Thu Sep 16, 2021 3:49 pm

I’ve been talking to a guy who says the late T’s..26/27 didn’t have the 2 piece valves like the earlier T’s did. Is there any truth to this ? Are the 2 piece valves easy to spot? The only way I’ve known is by the 2 holes in the valve head for the lapping tool.


speedytinc
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Re: 2 piece valves

Post by speedytinc » Thu Sep 16, 2021 4:05 pm

GG Gregory wrote:
Thu Sep 16, 2021 3:49 pm
I’ve been talking to a guy who says the late T’s..26/27 didn’t have the 2 piece valves like the earlier T’s did. Is there any truth to this ? Are the 2 piece valves easy to spot? The only way I’ve known is by the 2 holes in the valve head for the lapping tool.
They are easy to spot from the underside where the stem joins the head. There is no smooth transition like a modern valve.
Many 1 piece period valves have the 2 holes. Have seen many in T motors also.
I cant say exactly when ford went to the 1 piece valve without consulting McCally.

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Re: 2 piece valves

Post by DanTreace » Thu Sep 16, 2021 5:56 pm

Usually the give away is the twin holes for lapping forked tool. Also, if the surface is clean, you can see the stem junction.



Busted iron valve top, original 2 piece Model T design steel shaft, iron head.jpg
Busted iron valve top, original 2 piece Model T design steel shaft, iron head.jpg (86.73 KiB) Viewed 2212 times



Underside is clearly showing the steel stem, and the cast iron head.


IMG_1427 (2).jpg


The all steel valves were in the very last motors, around May 31, 1927, except export engines, and service stock was avail. after July 29, 1927.
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Re: 2 piece valves

Post by Allan » Thu Sep 16, 2021 6:24 pm

The two piece valves did have the two holes for the lapping tool and this can be a start to identifying them. But, a lot of the replacement one piece valves also had the two holes, so the underside needs to be checked anyway.

Allan from down under.


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Re: 2 piece valves

Post by GG Gregory » Thu Sep 16, 2021 7:09 pm

Thanks everyone


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Re: 2 piece valves

Post by TXGOAT2 » Thu Sep 16, 2021 7:11 pm

Two piece valves... not one of Ford's better ideas.


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Re: 2 piece valves

Post by J1MGOLDEN » Thu Sep 16, 2021 7:14 pm

Those two holes were not made for a lapping tool.

They were used to firmly and permanently attach the valve to the stem.


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Re: 2 piece valves

Post by speedytinc » Thu Sep 16, 2021 7:25 pm

J1MGOLDEN wrote:
Thu Sep 16, 2021 7:14 pm
Those two holes were not made for a lapping tool.

They were used to firmly and permanently attach the valve to the stem.
A common valve replacement was Dodge valves. 1 piece, larger O.D., with the 2 holes.
I have seen lots of one piece valves with the 2 holes.
I can buy the need for the holes to attach the head, but the practice continued past the 2 piece design.

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Re: 2 piece valves

Post by JohnH » Thu Sep 16, 2021 9:01 pm

GG Gregory wrote:
Thu Sep 16, 2021 3:49 pm
I’ve been talking to a guy who says the late T’s..26/27 didn’t have the 2 piece valves like the earlier T’s did.
26's certainly did have two piece valves - I know because I ended up with a hole in the cylinder head when one of them broke off.


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Re: 2 piece valves

Post by Dave Sullivan » Thu Sep 16, 2021 9:24 pm

Probably can check this quickly with a magnet, any good quality valve will have an non magnetic head, and usually a magnetic stem, just sayin.. Dave Sullivan in Bellingham Wa

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Matt in California
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Re: 2 piece valves

Post by Matt in California » Fri Sep 17, 2021 1:14 am

As mentioned the Model T only used two piece valves. Here is an example of the later two piece steel head next to the cast head:
69320BEA-A460-4D51-A4FA-D9932105C2CC.jpeg
Note that the steel valve has a gentle taper that stands out from the cast head:
FF53D2FF-6FA8-4578-AE5A-5677426AEBB6.jpeg
The steel head valve is marked on the steam “Made in the USA 3025”
D07E0077-48C3-4BB9-8C39-AB1650D0BD59.jpeg
And I tested it is not magnetic. That was something new to learn. I guess we should call it alloy steel head because carbon steel should be magnetic.
73C7ECC6-985D-4893-BD5C-AEEB7B30205E.jpeg
I disagree with anyone who says two piece valves are worthless. See the background of the photos. They make great handles for my bolt bins!

Enjoy!

Matt


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GG Gregory
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Re: 2 piece valves

Post by GG Gregory » Fri Sep 17, 2021 6:48 am

Hey Matt, I like those drawer pulls !

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Matt in California
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Re: 2 piece valves

Post by Matt in California » Fri Sep 17, 2021 12:44 pm

Thanks GG,
The price was right for the pulls! It just cost me some washers and time to cut and pean over the valve steam:
45813131-8682-475E-9DD3-7134BABC0B0C.jpeg
Matt

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