20.2mm id x 26mm od 2mm thick
Subaru supply a purpose made crush washer for the job
Not a copper one but a (single use) pressed metal one which crushes on instalation
You can only get them from Subaru..........
You can, and I do, re-use the old washer a few times before they need replacing - as long as its not squished dead flat it shouldnt leak
Last edited by Rexy03; 16-04-2009 at 08:27 PM.
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