thanks all: I found the EKTA refence as well, and
bought a packet of 20 x 26 x 3 mm o-rings at Pep Boys
for $ 1.59.  Way too small.
Then I matched the (stretched) old ring to the
reference book  and bought some bigger ones- just too
big.
I imagine I will need a 26 x 32 x 3 mm o-ring? Any
validation of this conjecture? TIA again-Geo.

--- Coby Smolens <cobys5@HOME.COM> wrote:
> I have it at 26mm X 3mm according to ETKA; VW Part
> #: N 902 781 01
>
> -----Original Message-----
> From: Vanagon Mailing List
> [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
> Of George Wietor
> Sent: Monday, August 20, 2001 5:37 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: 2.1 l. thermo body o-ring size?
>
>
> Hello: I am replacing the o-ring between the
> thermostat body and the engine on my '87 VANAGON.
> The one I removed is now stretched out of
> shape/size.
> Ineed to call around for one locally, but I don't
> know
> the size...
> Save me from having to completely disassemble/break
> the  thermostat housing.
> Van O'White thanks you in advance. George
>
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