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Welsh plugs

hey all, just about to replace the welsh plugs in my 202 block and im just wondering do i jus tap them in or do i need a sealant? lubricant? or anything like that when installing them? thanks in advance. jarrad

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When I replaced mine I just put some gasket goo all the way around, should do the job nicely.

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Stick shifts and safety belts,
Bucket seats have all got to go.
When I'm riding in the car,
They make My Baby seem so far.
I need you hear with me,
not over there in a bucket seat...

The pro's don't use gasket goo, if you dont get a seal, the gasket stuff won't last. You will have to get a drift the right size and hit them in square.

Trueheart

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I have always used a product called "Stag Paste".

I have had this recommended to me by several professional engine builders and I have never had a problem with it.

When installing the welch plugs tap them in squarely with a drift (or a large socket) which fits loosely within the welch plug.

Never ever hit the edge of a new plug as you will deform it and it will not seal.

I have always known them as Welch Plugs (but pronounced them as Welsh).

I believe both are correct but I have no idea why they are called either.

I know in many countries they are called expansion plugs because in very cold climates they can prevent cracking of the engine block if the coolant freezes (expands).

There's your useless bit of knowledge for the day!!

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Yeah i second that motion, "Stag Jointing Paste" is the go. Comes in a little yellow and red tube, the paste itself is a caramel/ light brown color.

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From their website......

A brief bit of totally obscure history that I am one of the few living persons who knows.

My family business, established in Pontiac, Michigan in 1905, is the original manufacturer of the "Welch" plug. The Welch brothers had a motor car company at the turn of the century that was later bought by General Motors - the Welch Motor Car company. They would run the cars around Pontiac to "break them in."

At that time core holes in the engine blocks were fitted with pipe plugs. During one of these run-ins a pipe plug backed out. In order to get back on the road one of the brothers drove a quarter or half dollar into the hole. From this they developed the Welch plug, some with the help of my Great Grandfather Martin Hubbard. They then patented the plug and the M.D. Hubbard Spring Company become the sole manufacturer of the Welch plug for the life of the patent. To this day we have the largest range of sizes available anywhere.

So the Welch plug in origin is an American innovation and name.

Best Regards,

Nevin Hubbard
M.D. Hubbard Spring Company
www.hubbardspring.com

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I just created an H page with a credit to you for the info.

[http://www.oldholden... | Welch Plug]

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T

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Holdenpaedia, they're the brakes Mate.

oo

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Well there ya go. I always thought they were welch plugs (not welsh), but never knew where the name came from.

Thanks for the info.

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