Re: water wetter questions

[Steve Rowe <srowe@xxxxxxxx>]

>Date: Wed, 27 Jan 1999 14:51:39 -0800
>From: "John Pease" <jpease@domain.elided>
>
>Steve wrote:
>
>>Aaron, I respectfully disagree. 
>>Some vehicles will reflect greater results than others.
>
>>Example: In the summer, my Jeep Cherokee temp gauge will start >to creep
>>over the 210(f) degree point in 100(f) degree weather with A/C >on and stuck
>>in traffic. This is with the standard 195(f) thermostat. After adding >R/L
>>WW, I have not seen the temp get to 210 at all.
>
>This sounds like water wetter is doing the job: making the  coolant more
>efficient at transferring heat out of the engine
>
>>In the fall, it takes a
>>very long time for the temp gauge to get to the normal operating >area if
>>R/L WW is in the system. So I drain and flush every year so I get >heat in
>>the late fall/winter and add R/L WW after the weather starts to >get hot.
>
>I don't know about Jeeps. Is there a sneak path for coolant to flow
between the
>radiator and the engine? I would be very surprised that such a path would be
>large enough to defeat the thermostat with just slightly better coolant.
Is it
>possible that your thermostat is sticking open?
>
>John Pease

John,
Specifically the 88-91 (I think) 4.0 liter Cherokees are notorious for
their convoluted cooling system. It is considered an "open" system. Many
folks on the different Cherokee digests have complained about this problem
for years. If you dont believe me, look here
http://www.off-road.com/jeep/cherokee/98/jun/cooling1.html. The annual
process I use has been a great success to me and few others. It is a little
more intensive since it is more than just a drain and fill, but it works
very well forme. I have tried R/L WW once in my 525i but did NOT noticed a
change, so I dont use it (if it aint broke...). I think most newer BMW's
have significantly more capable cooling systems. 
Steve

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