Re: Anti-freeze for Model A's ?

Posted by Larry Jenkins on June 16, 1997 at 19:43:21

In Reply to: Re: Anti-freeze for Model A's ?
posted by Bob Johnson on June 16, 1997 at 19:02:31

: Walt,
: Here is my antifreeze speech.
: The Model A was introduced before modern anti-freeze Ethylene Glycol was in use. The anti-freeze of choice for the Model A when it was new was alcohol.The problem with alcohol is it evaporates faster than water and needs to be replaced quite often.Modern anti-freeze compound are meant to work in a closed cooling system under pressure.The Model A has an open cooling system.If you use moderen anti-freeze the main draw back is that they tend to foam up and make a mess. There are several things that can be done to stop the mess.First you should have a radiator that is clean and has the proper flow.Second you can add an overflow tank and connect it to the bottom of the overflow tube. Next make sure that you do not overfill the radiator, fill just enough to cover the tubes. Make sure your radiator has the internal baffle at the top. The new anti-freeze based on Propylene Glycol does not foam as much.
: Suggestions,
: During the summer when it does not freeze
use plain water with a rust inhibitor.
: When freezing temperatures arrive use the new Propylene Glycol base antifreeze. You should flush the radiator anyway.
:
: Bob
Hi Walt..Guess you are quite confused by now.Let's assume you have rebuilt your engine properly, and don't have to worry about the anti-freeze solution attacking your bearings, although I don't know what ethylene glycol does to them. I would submit that if you have done the right things that you should never experience the reported problems.I use a 50-50 mixture of ethlyene glycol with a 5 PSI pressurized system wih no problems at all..

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