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[Ricky043]

An irritating, and increasing frequency, drip has started from the small outlet at the side of the radiator drain plug, which is located at the bottom L/H side of the rad.
There is no further tightening to be done on the red knurled (plastic?) knob just below it, so I assume one or more of the O rings has failed.
Problem is I cannot find a replacement drain plug anywhere (though not tried Vauxhall dealer yet). It looks like the sort of part that would be common across a number of cars, so if anyone knows a part number, that might help source a new one.
Otherwise I'll have to try and cap off the drain tube with a push fit stop end, if there's enough room.
My preference is to buy a new one.
Don't particularly want to remove the drain plug and replace the O ring(s) as the drain, once loosened, seems to be held in place by something that stops it coming out completely, so I don't want to force it out and potentially damage something in the rad.
Suggestions???

[YZ250]

………
Don't particularly want to remove the drain plug and replace the O ring(s) as the drain, once loosened, seems to be held in place by something that stops it coming out completely, so I don't want to force it out and potentially damage something in the rad.
Suggestions???

The drain plug is barbed on the end to stop it from falling out if I recall correctly. If you undo it, pull it out until it resists and then wiggle it as you pull. The end is a split barb design so a pull and wiggle should close the split enough to remove it. It is certainly removable without breaking it as I’ve removed mine in the past.    if it’s brittle and a barb does break off it will still be ok with 2 new O Rings. 

[johnnydog]

The original ones were red; in later years Vauxhall changed the design slightly and the colour to black.
The last replacement I bought was the red version made by Febi from Euro Car Parts.
They are still listed  and available for £5.79.
They fit a number of other makes and models, not just VX.
Not had any problems with it since I fitted it approx 5 years ago.

[johnnydog]

Or.....
https://ebay.us/m/BY1P8z

[Ricky043]

Thanks for the link to the ebay listing. Just bought it.

It looks the same as the used one on ebay for an Agila, that they want £11.00 for!!
Part of the issue with searches seems to be what you say you are looking for and if you call it the wrong name, it won't appear.

Anyway, thanks for taking the trouble to search it out.

[TheBoy]

I get a feeling the Red and Black ones are not transferrable?

[Ricky043]

New red drain plug installed and leak cured. Someone (not me) had previously put a fibre washer on the bottom by the thread which had stopped it seating probably. I only noticed the leak once it worsened.