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Oil filter Thread size?

Posted: 27 Oct 2008, 13:09
by cumbriankeith
I thought I'd seen it somewhere but can't find it by searching...
Could anyone please confirm the thread spec of the standard spin-on oil filter, please? I think I remember it as 3/4 UNF but I'm not certain. Vagcat shows a few thread sizes but not that one as far as I can see.
I'm thinking of fitting a sandwich plate for a temp sender and possibly extra cooler and want to get the right one.
Tankslot

Posted: 27 Oct 2008, 13:18
by Ian Hulley
See other post

Posted: 27 Oct 2008, 13:28
by Mocki
Aircooled and watercooled different size antway iirc

Posted: 27 Oct 2008, 13:45
by Ian Hulley
Ian Hulley wrote:WBX is definately NOT 3/4" UNF ... 100% not.

Sorry not to be more helpfull, haven't got one here to measure pitch etc.

Ian.

The WBX is a coarse thread ... which I shall measure given time ... sorry Steve didn't know they was different :oops:

Posted: 27 Oct 2008, 14:00
by Mocki
now ive been thinking about it, im not i was right in saying that, its bugging me now!
I was sure they are different, but now, i may be retracting that! :?:

More data

Posted: 27 Oct 2008, 17:15
by cumbriankeith
Well I've just had a measure of the thread and it seems to be a taper type with diameter of 0.75 inch at the middle of the thread. I only have metric pitch gauges and it does not seem to be either 1.75 or 1.5

I found a listing for a K&N hi-spec filter that lists the thread as "Thread Number 16 UNF-2B" - but I'm not too sure what that means. Any ideas??

Posted: 27 Oct 2008, 19:27
by Simon Baxter
3/4's UNF definatley.
16mm long thread.

Posted: 27 Oct 2008, 19:39
by Mocki
so are WBX and Aircooled the same thread Simon?
its been bugging me all day, after i thought they werent the same then argued with me sen alll afternoon!!

Posted: 27 Oct 2008, 20:13
by HarryMann
Most are on here somewhere, look under filter housing take-off plates etc...

http://www.thinkauto.com/acatalog/sitemap.html

Posted: 27 Oct 2008, 20:29
by Simon Baxter

Posted: 27 Oct 2008, 21:34
by cumbriankeith
That's brilliant Simon - thanks very much!