Core Plug size?

[Lotz-A-Landies]

Anyone know the exact size of the core plugs in the side of the S1 2litre block?

[chazza]

If they are the same size as the 1.6 litre, I can go and measure my spare ones for you,

Cheers Charlie

[Lotz-A-Landies]

If they are the same size as the 1.6 litre, I can go and measure my spare ones for you,

Cheers CharliePretty sure they're the same!

[chazza]

Whoops forgot to ask you which core plugs!

The threaded ones are 1" British Standard Conduit, 16 t.p.i.

The cupped ones I also bought from Dunsfold, let me know if you want them measured but I have installed them, so it might be tricky to measure,

Cheers Charlie

[series1buff]

Anyone know the exact size of the core plugs in the side of the S1 2litre block?

Diana :

If your after the three cupped style plugs in the side of the block.. the size is rather odd , something like 1 and 15/16" ... can't remember exactly from memory. BUT, most engine rebuilders and even auto parts shops stock brass ones in many sizes . I managed to buy some in Warragul much to my amazement.

MIKE

[groucho]

Diana.

I think the old size is 1"/31/32 or 50mm. but i stand to be corrected.
I have a box of them somewhere..........

[iain reed]

very timely post as i have just done one on my 57 today, yes they sell the 50mm ones at repco but they are a tad to big... armed only with a bench grinder sorted!!! a little bit at a time and in it goes all good now
i think they are about 1mm to big
:)

[back_in]

Hi Diana
when in UK last
i was told the thread was British Standard Pipe
the 1600 are smaller, 2ltr are a larger diam.
if you want some I have several sticks with 5 or 6 plugs in a threaded lenght
they are wound in and then cut off flush
send me a PM
cheers
Ian

[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

[dennisS1]

I am one of those people that would call them Welch plugs, and the holes are a pretty common size in Welch plugs available at Bursons and the like in Brass.
I have a steel one that I just take in and say give me some in brass.
I have not seen the round, hit in the centre plugs for some time.
Will get out the sliding measuring stick later today and let you know the outside diameter of the plug, this is often stamped on them.
The thread on the sacrificial anodes (Al plugs in the block) is in deed British conduit not pipe.
Dennis
PS there are some stell plugs about with a brassy finish, good for a week or 2.

[groucho]

The plug sizes, and the one in the above post would probably be the nearest size in the old measurement. Best to measure the hole size in the block...





https://www.aulro.com/afvb/images/imported/2011/02/909.jpg

[back_in]

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

[dennisS1]

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.
https://www.aulro.com/afvb/images/imported/2011/02/854.jpg
Rear core plug this was steel and the flat hit in the middle type rusted out size of hole 1.13".
https://www.aulro.com/afvb/images/imported/2011/02/855.jpg
Brass cup plug removed from right side, I was told plug where replaced in the early 70s.
https://www.aulro.com/afvb/images/imported/2011/02/856.jpg
Plug sitting back in hole inside out. Question from this photo who can tell me what type of engine this is?
https://www.aulro.com/afvb/images/imported/2011/02/857.jpg

Dennis

[russellrovers]

spreadbore 2litre

[wrinklearthur]

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 (http://wiki.answers.com/Q/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 :D

[groucho]

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

[Lotz-A-Landies]

Hi Diana

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

<snip>

Cheers Arthur :DArthur

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: 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

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

Diana :)

[Lotz-A-Landies]

Pugs
Hi Diana
have a stack of them too
<snip>I have a stack of Pugs* too -

https://www.aulro.com/afvb/images/imported/2016/11/481.jpg

Image when some of them were puppies!

Diana :D

* Your post "original title"

[dennisS1]

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

[groucho]

I'll take a guess and say siamese bore......

[dennisS1]

2L or 1600 and why?
Dennis

[groucho]

2l they started with the 2 piece water rail. the 1.6 it was still a blank casting at the back..

[dennisS1]

You win IOU the first beer at Blinman this Easter.
The other give away is the casting below the centre hole, if it was a 1600 would have a large hole and two taped holes for the breather, on a 2l spread bore oil filter mount.
Dennis
NB: Prize not including travel.

[groucho]

It got me thinking about the siamese block that i have. The early ones were not blank castings, but must have carried over from the 1.6. it had the same breather pipe arrangement as the early engines. And the plug at the back of the block is a lot smaller also.....





https://www.aulro.com/afvb/images/imported/2011/02/688.jpg

[dennisS1]

Gota love the nice neat hole they knocked through the cast. Was tat one hit or two.
What is the serial number of your 2l blocks and are they from 80" or 86/107?
Dennis

[groucho]

That was in a 1952 80" lived at Mendooran all its life 100% oridginal
Driven till it would not go another yard, then parked under a gumtree for 18 years. The hole was not punched but a clean casting hole. Drained 5 gallons of rusty water out of the sump. It had a high water mark 3/4 the way up the timing case. Eng No 26110096. Gearbox and diff No's all close to that No also

[groucho]

The crack between No 1&2





https://www.aulro.com/afvb/images/imported/2011/02/677.jpg

[groucho]

Not the best piccys but..........
The plug repair.......





https://www.aulro.com/afvb/images/imported/2011/02/676.jpg

[groucho]

A little better one of the crack. I'd say that the repair was quite ok.




https://www.aulro.com/afvb/images/imported/2011/02/675.jpg