[Land-speed] Radiator Catch Cans...

[Doug Odom]

The overflow tank must be vented. If you want to recover the water that is 
pushed out from expansion the hose from the motor must be below the level in 
the tank. Recovery systems must use a recovery type rad. cap. There are 2 
rubber seals on the recovery type cap. As the motor cools it pulls the water 
back passed the flapper valve in the cap. The flapper valve works like a one 
way valve. Set up correctly the system will burp the air out and the system 
will be 100% coolant if you don't open it. If you ever see a car with the 
hoses sucked together it is because the flapper valve is not working. My 
wifes car years ago had that happen.
Doug Odom in big ditch



----- Original Message ----- 
From: "Rich Fox" <v4gr at rcn.com>
To: <neil at dbelltech.com>; <drmayf at mayfco.com>; "'James Tone'" 
<gmc6power at earthlink.net>
Cc: "'LSR'" <land-speed at autox.team.net>
Sent: Wednesday, April 16, 2008 7:51 PM
Subject: Re: [Land-speed] Radiator Catch Cans...


>> Looks like to me that as the water heats it expands and pushes out teh
>> excess into a sealed container. As it cools it contracts and the pressure
>> now higher in the container pushes the water back. Venting would seem to
>> defeat the principal  RF