By pass hose spigot.

[midget]

Have to replace the above on my A plus head and have one from Minispares. Last time I changed one it had a slot in the end for wide blade driver to facilitate fitting, but this one is plain ended. Is there a tool/adaptor that I am unaware of which is used for this purpose please?
It does not want to enter the thread more the 1 1/2 turns by hand so do not want to cause damage by using brutal methods.
Also is any sealant required?

[philthehill]

The threads in the head for the bypass hose spigot are 5/8" x 16TPI Unifies National Special (UNS) and is not a taper thread.
The spigot is not 5/8" x 18TPI Unified National Fine (UNF) as usually described and tapered.
Therefore you will not be able to screw the UNF threaded stub into the cylinder head.
The correct spigot is available from Mini Sport Padiham.

https://www.minisport.com/12a2075-cylin ... e-kit.html

The spigot with the correct thread can easily be screwed into the head, smear the threads with Loctite and nip the stub tight with a pair of water pump pliers. It does not have to be griped so tight so as to mark the stub.
Phil

[midget]

Aha, thanks Phil. Still sounds like butchery though? I imagined a socket with a hard rubber(?) insert to grip it sympathetically.

[philthehill]

John
There is no special tool for removing & refitting the spigot.
The original BMC ones used to have a screw driver slot in the end for tightening - absolutely no good for removing though as the spigot/screw driver slot is usually rusted away.
You can file a 1/8" x 3/16" deep slot in the end and use a large bladed flat screw driver if you wish but the spigot does not have to be tightened excessively.
The Britool E14 1/2" drive flat screw driver socket is ideal for use in conjunction with a 1/8" x 3/16" deep slot in the stub as the blade is 1 " wide x 1/8" thick
If you do not have the Britool screw driver blade and do not want to file a slot you could use the tang of a chisel knocked into the centre of the spigot to tighten and then wiggle the tang to release.
Phil

[ManyMinors]

I've just had to replace mine and bought a new one from Bull Motif Spares. This came with a hex to aid fitting it which was very easy - once I'd removed the remains of the old one..... Unfortunately I don't have a photo as it is all back together now.

[philthehill]

http://www.morrisminorspares.net/shop_item.php?ID=1759

[philthehill]

Interestingly the stub pictured in the Morris Minor parts list as Pt No: 2A243 has the screw driver slot as standard.
I do not ever remember seeing a hexagon on any of the original BMC stubs I have fitted in the past.
Definably of benefit when removing or fitting a new stub.
The threads should be 5/8" x 16TPI & I would be interested to know if the BM stub does have the right thread.

[ManyMinors]

Phil. I think Bull Motif had these specially manufactured in order to make replacement more straightforward. I agree, the original BMC ones all had a slot in them as far as I remember which , as you say, was fine when fitting them new but less use when removing a rusty one....
I didn't measure the thread but having removed the very rusty remains of my old stub and thankfully found the thread in the cylinder head to still be in good condition, I simply cleaned it up and screwed the new one straight in without difficulty so I would say that the thread must be correct. I cut a new bypass hose from a length of heater hose as I cannot stand those soft squashable replacements which often last very little time and all is now as good as new.
I had hoped that the slight leak I'd spotted was simply a bypass hose - or water pump leak. I removed the water pump complete with the hose, only to find that there was no longer ANY visible bypass stub protruding from the bottom of the cylinder head. At that stage I realised that I was also going to have to remove the head as well but fortunately all was perfectly straightforward. The beauty of the good old "A" Series!

[philthehill]

ManyMinors

Thank you for the information regarding the BM stub.

If the water pump spigot goes this may be a repair solution:-

http://www.ebay.co.uk/itm/Classic-Mini- ... bZiJithh4A

Phil