I am getting ready to do an oil change for the season. But I was wondering on the size of the copper washer for the oil tank. I have gone to all the local auto parts stores and they don’t have an exact match. Could you let me know? Thanks.

 

Hi - the Aston Martin OEM part is 1 inch (OD) by 5/8 inch (ID). But it's quite a loose fit on the plug, so I don't think it's essential to get exactly this size - the nearest you can get will probably be okay.

 

Check out post #114 for details on the copper washer and other consumables:

https://www.6speedonline.com/forums/...-change-8.html

 

at some point I bought a aluminum washer kit & copper washer kit from amazon. Assorted sizes in quantities that my future grand kids will appreciate... Has solved this problem a number of times.

 

Thanks. I looked for this post but never could find it.

 

Aug 7, 2016 | 03:17 PM
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#114
@DonL
@DonL
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Flat Copper washerQuote:
Originally Posted by blue2000s
I've seen alternatives for the drain plug, the o-ring and the oil filter. How about the copper washer? Is it just a flat washer or does it have a special profile?
Although it's not an exact replacement, I've been using Dorman #097-138 as a substitute for the AM OEM copper drain washer on the dry sump oil reservoir on my 2007 4.3 Vantage.

DORMAN -097-138: Metal; Size; M14; Inside Dia: 0.61"/15.6mm;
Outside Dia.: 0.94"/23.9mm; Thickness: 0.079"/2mm

AM: OD = 1.0"/25.4mm ID: 0.64"/16.25mm; Thickness (used):0.57"/1.45mm

Since the substitute is a bit smaller on the OD, you have to take a little care to center it when installing. Use at your own risk.

Oil Drain Plug: Dorman 090-115: M14-1.5 w/13mm hex

Both are available from rockauto dot com: The copper washers are sold in a box of 10 for less than $10 + s/h ($0.94 each).
The drain plug is less than $3 + s/h.

I normally just replace the drain plug gasket rather than the whole assembly, as the metal part doesn't usually wear out .
You can see the gaskets in the bottom of the photo; but I can't, at the moment, remember where I sourced them...senior moment I guess?

I suspect any good auto parts store can supply 14mm ID oil sump drain gaskets, if you choose to go that route (as well as M14-1.5 drain plugs at a cost less than AM charges).
The availability of the copper gaskets might be another story...
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Current price on rockauto has increased by $0.03 each. Still a bargain.

 

maybe these rubber seals Ford m14