Date: Mon, 6 May 2002 18:06:03 -0400
Reply-To: Dennis Haynes <dhaynes@OPTONLINE.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject: Re: bubbling in coolant during flush
In-Reply-To: <F99NbtFqFBjz30ef8rv0000da5a@hotmail.com>
Content-Type: text/plain; charset=us-ascii
Flushing cold water through the engine while it was hot or running is
the ideal method to crack and warp heads. Why do people do this? All
cooling system maintenance should be done with a cold engine. Rapid
temperature changes are no good. The cooling system can be flushed cold
through one of the heater hoses. Operating the system non pressurized
can cause the water to vaporized as low as 140, (water does vaporize at
room temperature). The heads and upper cylinders will get well over 210,
which will flash vapor plain water in an open system.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf
Of Mark Dorm
Sent: Monday, May 06, 2002 8:41 AM
To: vanagon@GERRY.VANAGON.COM
Subject: bubbling in coolant during flush
Hi. I flushed out my coolant and after the engine had been running and
water had been pouring through the system thanks to a garden hose, I
noticed a lot of air begin to bubble up out of the main tank. So either,
its because of crack or headgasket??? Or the water was boiling
internally, there was a lot of absorbed oxygen in the water, I had air
stuck in the system, there was a minature scuba diver from that show in
the 60's.... I give up. Anyway, the water bubbling was pretty much
non-stop. I had the main tank pressure cap off, and was feeding water
from the heater exchange hose that once had a coupling but now has a
tee. Which makes me wonder, if I'm adding water under pressure, albeit
low pressure, whats stopping air from being added with it?
BTW, Erik V said to turn on the engine during a flush AFTER water is
leaving BOTH the main tank's opening, and the radiator bleeder valve.
Well, I couldn't get coolant to leave the radiator valve (after it began
pouring out of the main tank reserve). I had to turn on the engine to
get it to do this.
And when I drain the coolant from where the coupling once was and tee
now is, only about a gallon and a half came out, which means that
another two gallons remained. And these remaining two gallons get
flushed out onto the ground. Not very environmentally safe is it?
_____
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