Hi There

Can anyone tell me what thread the end of the breather is so I can make the pipe up.



Many thanks Regards


Martyn

email (option): martynhillyard@msn.com

If you're talking about a WD M20 the thread is 3/16" BSP...

If it's a later M20/21 with the breather in the timing cover it's 1/4" BSP...Ian

3/16 BSP Ian? Are you sure? I didn't know there was such a size? I'm sure my WD M20 is a 1/4" BSP. Ron

email (option): ronpier@talk21.com

Sorry Ron..A lapse on my part...I meant 1/8 BSP...Ian

Yes I just checked mine. 1/4" pipe with a 1/8" BSP fitting. Ron

email (option): ronpier@talk21.com

Hell fire Ian, I was worried then,
I was getting all jittery as that's a tap n die I don't have 😳

Thanks for clarifying or I was off to google...............🤔

Hi All
Thanks for the replies

Yes for a WM20, there was supposed to be a picture but it didnt show!

So 1/8" it is with 1/4" pipe

Cheers!

Martyn

email (option): martynhillyard@msn.com

And if you have trouble finding the correct looking fittings and pipe in imperial sizes. I use this firm. Ron

https://www.vintagecarparts.co.uk/categories/vintage-car-parts-taps-pipe-and-fittings-fittings

email (option): ronpier@talk21.com

['Thanks for clarifying or I was off to google']...

Hi Darren...Don't thank me, thank Ron...I didn't even notice I'd made a mistake in my post... ....Ian

Ron Pier

And if you have trouble finding the correct looking fittings and pipe in imperial sizes. I use this firm. Ron

https://www.vintagecarparts.co.uk/categories/vintage-car-parts-taps-pipe-and-fittings-fittings

email (option): martynhillyard@msn.com

Hi Martyn...An 1/8 BSP thread has an outside diameter of .383"...

I'm pretty sure the original breather pipe was less than 1/4" diameter but I'll have to check that and post again unless I'm beaten to it by someone else....Ian

So much for my memory (again)...I've checked an original pipe and it is 1/4" diameter...Ian

[/quote]

Great website thanks!

Is it just me though or is there no options on there for a 1/8" BSP Thread for 1/4" pipe or am I getting my ODs and IDs mixed up?[/quote]

I must confess, It is a bit confusing. Probably best to email them and tell them what you need.....1/4" pipe with nipple and 1/8" BSP nut. Or maybe Russell Motors have the breather pipe already made up, in stock. Ron

email (option): ronpier@talk21.com

Just contacted them and they say they cannot supply that size.

Looked on Russell Motors site and cannot see it listed so will just use one size down on the pipe I reckon which should still do the job

email (option): martynhillyard@msn.com

OK. But Russells site is long out of date. You're best to just ring old Les.

Ron

email (option): ronpier@talk21.com