MK2 3.4 1963 Radiator Drain Tap

[Rob_Reilly]

The thread is 1/4-19 BSPP.
Almost but not quite the same as 1/2-20 UNF.

This subject came up recently on the XK and pre-XK forums.

Coolant drain tap XK120/140

Me again! Is the thread different between the engine and radiator drain taps? They look similar but the radiator tap is C980 and the cylinder block one is C2354. I have what I think is an XK140 rad drain tap with a soldered-on piece of downward curved copper tube. I like the design - would it fit the XK120?

Mark V Remote Radiator Drain Tap

Just curious if anyone has any knowledge of the rod operated tap used on early Mark V saloons. [image] I found one picture of 627182 where I see a small bracket with a rubber grommet on the left hand side of the radiator angle bracket under the top tank. [radiator drain tap control rod bracket] Its not much to go on, but I imagine the tap must have had a loop on top instead of a handle, and a rod with 90 degree bends at each end, one of which went into the loop and was held by a cotter pin?