Re: What is this stuff in my coolant?

[SailingFC@aol.com]

Tosha,
My guess is it's just rust(iron oxide).  If you cooling system was drained 
the whole time, the metal was exposed and probably developed a rusty scale 
surface.  Once you filled it back up and ran it, it flaked off.  Oil will 
make the coolant cloudy and whitish and like you've determined will pass the 
lipids(oil/paper) test.  I'd just watch it and it if doesn't come back, chalk 
it up to over exposure.

-Dick-
78 Scirocco
Original Owner
http://member.aol.com/sailingfc/

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In a message dated 6/20/01 4:57:00 PM Pacific Daylight Time, 
tberk@mindspring.com writes:



On the way out, in Reno, I found what I describe as Mocha Frapachino
floating on top of the rad fluid, (NOOOoooooooooo.....)  I let it expand
out and on the ground and topped off.

Since then I find no great amount but a slight & diminishing 'scum'
which when I dip my finger in comes back (after drying out) as a light
brown (even looked like it might have had small amount of golden-ish
tint in places) dry, dusty rusty powder. Doesn't seem oily at all, won't
make paper translucent.

So, is it possible I had a nasty amount of clogged up gunk in the heater
and/or cooling system and it was purged during my high speed run? Or is
it like I might have originally thought and is the head gasket slipping
synth oil into the coolant?

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