NetNews Usenet Archive 1992 #18/NN_1992_18.iso/spool/rec/autos/tech/11168

Text File | 1992-08-16 | 1.6 KB | 40 lines

Newsgroups: rec.autos.tech
Path: sparky!uunet!zaphod.mps.ohio-state.edu!menudo.uh.edu!lobster!nuchat!kevin
From: [e-mail] (Kevin Brown)
Subject: Re: RMI-25 cooling system treatment
Message-ID: <[e-mail]>
Organization: I can't see any in the immediate vicinity...
References: <[e-mail]> <[e-mail]>
Date: Wed, 12 Aug 1992 22:44:43 GMT
Lines: 29

In article <[e-mail]> [e-mail] (Peng Wu) writes:
>An important function of antifreeze is, in my opinion, anti-boiling.  If the
>cooling system treatment RMI-25 does not raise the boiling temperature of
>water much, I would hesitate to use it with plain water in a car designed to
>use antifreeze, regardless other promises.

While the boiling point of the fluid is raised by the antifreeze, the
antifreeze will also reduce the heat transfer capacity of the fluid.

The primary method of increasing the boiling point of the fluid is to put
it under pressure.  This is why most automotive cooling systems run at 15
psi or so over atmospheric.

Antifreeze is just that: something to keep the fluid from freezing.  The
"coolant" term for it is really a misnomer.  Antifreeze also has corrosion
inhibitors and lubricants which prevent the passages from corroding and
help lubricate the water pump.

If you're having cooling problems, and want to increase the cooling capacity
of your cooling system, running straight water works much better than running
a water/antifreeze combination.  But in doing so, you lose the other
properties provided by antifreeze.


--
                Kevin Brown

                [e-mail]
                [e-mail]