Only one more modification needed, Cole. You need to replace the
radiator cap with a newer style, that also has a rubber seal around the top
of the filler neck. That way, suction will pull the coolant back into the
radiator as the engine cools off. A stock cap just has a metal disc at the
top, since it didn't have to be an air-tight seal.
Just remember to use a low pressure cap - I don't think the stock
cap was rated much above 9psi. I'm not near my shop manuals at the moment,
so I can't check the pressure, but I imagine a suitable cap should be
available from one of the Sunbeam vendors. Any recommendations, listers?
Jon Arzt
Omaha, NE USA
----- Original Message -----
From: "Harvey, Cole E" <cole.harvey@baesystems.com>
To: "Alpine (E-mail)" <alpines@autox.team.net>
Sent: Wednesday, March 13, 2002 5:51 PM
Subject: Coolant overflow tank
> Hi all,
>
> I read some past posting about coolant overflow tanks, and made one for my
> SII. It is just a bottle with a hose that extends to its bottom with the
> other end connected to the pressure valve on the header tank. I ran the
car
> and the bottle filled up, but as the car cooled the coolant did not return
> to the header tank. Am I expecting too much here? Is my pressure valve
not
> functioning correctly? I was thinking that the coolant should be sucked
> back into the header tank.
>
> Thanks, Cole
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