oil drain plug

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Aug 26, 2018 | 09:16 PM

jomo

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Joined: Jul 2013

Posts: 574

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From: Upstate New York

oil drain plug

Hi,
Can some please tell me the size of the drain plug for a 95 xjs and a 96 xj6 as I can't seem to find this information anywhwere.
Thank you

Aug 27, 2018 | 04:27 AM

kingnero

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Joined: May 2016

Posts: 137

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From: Belgium

This one is mine, can't however say for sure it's the original part.
You'll also want a copper washer inside diameter 21 mm.

Aug 27, 2018 | 05:10 AM

GGG

Joined: Dec 2011

Posts: 120,439

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From: Durham, UK

That looks right for OE.

Careful when tightening. Stripped threads can lead to a very exciting weekend!

This one came from the PO with a leaking plug.

Graham

Aug 27, 2018 | 05:45 AM

Vee

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Joined: May 2010

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From: Arlington, VA

That’s the part alright! No need to go overboard on the tightening, it will make removal in the future more difficult than it needs to be...

My washer is a zinc washer with some rubber gasketing material on the inner diameter....sure they all do the same job.

Aug 27, 2018 | 05:49 AM

kingnero

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Joined: May 2016

Posts: 137

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From: Belgium

LOL. I could easily take a picture of mine, because I've retapped my oil pan for a larger size... Was siliconed shut when I bought it.

Aug 27, 2018 | 08:39 AM

Lady Penelope

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From: Kansas City USA

Raook me 8 days of penitratimg oil ad heat

Aug 27, 2018 | 10:18 PM

jomo

Thread Starter

Senior Member

Joined: Jul 2013

Posts: 574

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From: Upstate New York

Can someone please tell me the thread sizes for the oil drain plug for the 95 xjs and 96 xj6

Last edited by jomo; Aug 27, 2018 at 11:22 PM.

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Aug 28, 2018 | 09:50 AM

Vee

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From: Arlington, VA

M20x2.5

Aug 28, 2018 | 10:27 AM

Ric in RVA

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Joined: Sep 2017

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From: Richmond VA

Quote:

Originally Posted by Vee

M20x2.5

I can't even imagine what prompted them to use such a huge plug with such coarse threads in an aluminum pan with no structural requirements except to hold back some oil.

It is just comical.

Aug 28, 2018 | 12:05 PM

#10

kingnero

Senior Member

Joined: May 2016

Posts: 137

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From: Belgium

Quote:

Originally Posted by Ric in RVA

I can't even imagine what prompted them to use such a huge plug with such coarse threads in an aluminum pan with no structural requirements except to hold back some oil.

It is just comical.

from a mechanical viewpoint, the shear surface is the same for a coarse as for a fine thread (with a slight advantage for the fine thread), and a coarse thread is harder to cross thread.
Not such a bad choice after all, I'd say...

But I agree, most other oil pans I've seen have M14 or smaller as an oil drain plug.

Last edited by kingnero; Aug 28, 2018 at 08:35 PM.

Aug 28, 2018 | 01:25 PM

#11

motorcarman

Joined: Dec 2009

Posts: 13,692

Likes: 9,638

From: Wise County,TX

You can drain 9 quarts of oil pretty fast with a 20mm hole but they should have used a 13mm hex head on the bolt to lessen the chance of over-torquing!!!!

bob