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Discussion Starter · #1 · (Edited)
Kohler Guys: Looking for Info on Re-Installing Welch Plug

I have a K321 series engine. There is a little cover about that size of a half-dollar, silver, and domed, on the outside of the engine. It is called a Welch plug or Welsh plug. Removing this plug will enable you to visually inspect the governor gear. I put one in a year ago, and it started leaking oil. I put in a new one today, and it leaks like a sieve. So where did I go wrong? I just hammered it in place with a big socket, dry. Are you supposed to use Permatex or some other gasket making material? I was kind of reluctant to use one of those silicone based gasket makers in case I have to remove it. I don't want any of those little particles falling into the block. So you've heard from the amateur. How do you pros do it? And yes, I am using new plugs when I put them in. Thanks.
 

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I found that a previous owner used "rubber cement" to install a fuel pump!
What a gooie mess!! But the goo never hurt the engines operation at all.

Rubber cement? Everyone knows you should use chewing gum!

I personally use the high temp form a gasket products.
 

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It doesn't hurt to use a little sealer, but the secret of a welch plug is to install it with the dome to the outside and hit it in the center. This causes the plug to expand and seal better.
 

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Governatorial advice.. o7$H#$&&^&$%@@4 &^*$^&$ 2$ @#$%
**(Comment delted to conform with MTF rules!)

ON a side note..
Check the CC's welch plug ring for deformation or other surface maladies as that will definately cause your troubles.. Inspect it closely.. :goodl:
 

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Discussion Starter · #5 ·
It's fixed. I wacked it like Mr Curtis said, problem solved. There are very few things in this life that can't be fixed with a hammer, a pipe wrench, and plain old brute force. :fing32: Thanks for the tip.
 

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I was trying to figure out what cover you was refering to. Is it the round plug below the exaust port?
 

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Discussion Starter · #7 ·
Yes, sir, that would be what I am talking about. After speaking with other people who know far far more about Koehlers than I do, I found out that thing is called a welch expansion plug. I whacked it in the center with a hammer, no more oil leak. Fixed with a hammer, what could be easier? Thanks for checking in. Have a great Christmas. Hot Ajax
 
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