Thread: Core Plug size?

Hi Diana
have a stack of them too
when the mob talk about screw thread
hard to think welsh pugs
that is what us old folks call them
inc every mech'man i have ever met
cup core plugs?
must be something east of the range
do not tell Julia, she will put a levy on them
any how if you want them
they are a dime a dozen
cheers
Ian

This may be of interest just pulling down a motor at the moment and the three different plugs that are used.
Left side of block sacrificial anodes (core plugs) as you can see they have been sacrificed. Note this S1 has alloy water pump would never have heard of coolant still had water in it from when it was last used 15 or so years ago and the pump and intake manifold are perfect so they did their job.

Rear core plug this was steel and the flat hit in the middle type rusted out size of hole 1.13".

Brass cup plug removed from right side, I was told plug where replaced in the early 70s.

Plug sitting back in hole inside out. Question from this photo who can tell me what type of engine this is?


Dennis

spreadbore 2litre

Originally Posted by Lotz-A-Landies

Ian

It's the cup core plugs I want the size for (the ones that some people wrongly call Welch plugs).

Diana

Hi Diana

what do you call them if they are not welsh plugs?

Answers.com - What is welsh plug

I am about to go through this same exercise, replacing the frost plugs in a 2.25 series IIA motor. the casting plugs I am looking for are the brass type water jacket plugs, but seeing that I can remove all of the freeze plugs fairly easily, I intend to write all the block plug sizes down in my parts book next to the part number for the core plugs.

Cheers Arthur

Diana
Found some 1/15/16 brass ones if they are the right size
you can have 3 if you want them....... make that 4

Originally Posted by wrinklearthur

Hi Diana

what do you call them if they are not welsh plugs?

<snip>

Cheers Arthur

Arthur

Welch plugs were designed by the Welch Brothers of the Welch Motor Car Company of Pontiac Michigan and Patented by M.D. Hubbard Spring Company in the early 1900's.

They are essentially a flat disk domed up to reduce the outer diameter, they are inserted up against a shoulder in the casting hole, then the dome pushed flat, expanding the diameter and forming the seal in the water jacket.

It is one of numerous designs of "core" or "freeze" plugs, which include the Welch, the cup and the solid threaded designs.

see: [ame="http://en.wikipedia.org/wiki/Welch_plug"]Core plug - Wikipedia, the free encyclopedia@@AMEPARAM@@/wiki/File:Corroded-Core-Plug.JPG" class="image"><img alt="" src="http://upload.wikimedia.org/wikipedia/en/thumb/e/e3/Corroded-Core-Plug.JPG/250px-Corroded-Core-Plug.JPG"@@AMEPARAM@@en/thumb/e/e3/Corroded-Core-Plug.JPG/250px-Corroded-Core-Plug.JPG[/ame]

In a series Land Rover there is no shoulder in the core holes so the cup design of core plug is used.

Diana

Originally Posted by back_in

[Title]Pugs[/title]
Hi Diana
have a stack of them too
<snip>

I have a stack of Pugs* too -



Image when some of them were puppies!

Diana

* Your post "original title"

Sorry Russell the clue is in the last pic. Will leave it open for a bit to see if an other takers.
Only 3 other types.
The rear plug hole in a S1 block has the lip and often found with the flat type plug.
Easiest to fit when doing a repair through the firewall inspection hole.
Dennis