I agree that raising the boiling point of the coolant by either
pressurizing the system (which is what Dave asked about) are adding
antifreeze may not be the correct solution to the problem. What it may
do is prevent boiling off of his coolant, which may be why his truck is
overheating. No coolant is definitely not good.
I fought cooling problems in my '57 GMC daily driver for the first two
years I owned it. I finally took it to a local radiator shop and told
the guy to pull the top and bottom tanks from the radiator and put a new
set of cooling coils between them. My truck (160 degree thermostat) now
runs through stop and go traffic on the way home from work with the temp
gauge (checked against an Infrared Thermometer) sitting just under 180
in Houston typical summer mid 90s at 5PM with the A/C on.
-----Original Message-----
From: kinderlehrer@comcast.net [mailto:kinderlehrer@comcast.net]
Sent: Monday, June 05, 2006 2:41 PM
To: Hanlon, Bill (ISS Houston); Dave; oletrucks@autox.team.net
Subject: RE: [oletrucks] Unpressurized Cooling System - OK to
pressurize?
Ok, Bill, but isn't the objective to lower the temperature so it doesn't
approach the boiling point? It's my understanding that antifreeze
actually limits the ability of the water to transfer heat away from the
engine and dissiapate it in the radiator. When I had a problem with
overheating in an old car I have, I reduced the amount of antifreeze to
about a 10% mixture and it now stays pretty much right at the 180
degrees rated on the thermostat. Some antifreeze is good because it does
prevent rust and has some lubricants. I've also heard that Water Wetter
can help dissipate the heat. I was adding that before reducing the amout
of antifreeze and i t seemed to help. Just a thought, Bob
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