The heat exchanger is an engine oil cooler.  It has an  59x5mm o-ring, part
# N 901 814 02.  I used the seal from a used oil filter the last time I
installed one.  It is standard equipment on diesel Vanagons and turbodiesel
cars.

Mike Snow

> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
> Of Rachel Cogent
> Sent: Friday, June 15, 2001 7:47 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Diesel Assembly Confusion.
>
>
> Please advise:
> I am now assembling my '83 1.6D engine but have a snag.
> There is a heat exchanger between the oil filter mount and the filter.
>
> Q: What exactly does this exchanger do?
>
> This metal box has two hoses going in and out and is held on by a large
> threaded tube which the filter screws into at the lower end.
>
> Q: Which is the pressure end, this tube or the outside?
>
> The gasket set I have which is very complete does not have a
> sealer for the
> top of the exchanger and I don't remember how it looked when I took it
> apart.
>
> Q: Is this exchanger even standard equipment?
>
> It seems like there should be some copper rings or something for the metal
> contacting parts but no such sizes are found. Does anyone have an exploded
> picture of this assembly that can explain to me what to do?
>
> Thank you for any help here.
>
>                             Rachel