Towing Temps

[Eric_77]

Try getting some stuff called Red Line Water Wetter. We use it in racing applications because we have to use water only. The water wetter is a soap like substance that breaks surface tension and allows better heat transfer to the coolant. I put it in my truck and saw maybe 5-10 degree cooler on real hot pulling days.



You can find water wetter at hot rod shops and some motorcycle dealerships. I do not think anything below 230 is anything to worry about even though I have never seen above 220. Pure water we see 240 in our race bikes and that is NOT boiling over with a good cap.

 

[Dkevdog]

Hey Eric that wetter sounds interesting. Did you take a look at that Evans Cooling? I posted the a few replys up. I called them today and it is basically like your wetter- except different. It uses a non water solution (NPG) to completely replace the 50/50 solution normaly used. It has a much higher boiling point, is non corrosive, environmentally safe and significantly reduces if not eliminates pressure to create a no/low pressure system. Sounds good. I'm considering giving it a try.



Kev

 

[JMorrow]

Kev if you do try the EVANS let us know how it works. I may try it also.



Thanks John

 

[Cliffman]

Over Heating

I had a similar problem with my 94 auto. Over cooled when unloaded (never got over 160) and over heating when pulling a 6% grade. Fought this thing for 2 years, 4 thermostats, rodded the radiator, new water pump and the Horton fan clutch . Finally I called Jim Leonard and after about 10 min. on the phone he suggested I replace the "jiggle pin". Thats right a "jiggle pin". It's used the "burp" the cooling system when you add water or flush the cooling system. The problem was that it was stuck open. On my 94 it was just above the thermostat. Cost about $5. 00 or so and took about 3 minutes to install. Cooling system worked perfect after replacing it.

 

[Extreme1]

There are 2 things to check here:

The jiggle pin and the fan clutch.



The fan clutch diagnostic procedure is in the FSM.

 

[Eric_77]

Unsure about Evans. I had looked at it for our racing but the price and the slipperiness of it it held me back. I would think that the product would not make much differnence in temps but would prevent boil-over. I am unsure what temp the engine actually overheats at is it when the water overheats or is there a higher metal temp that it overheats at so by using a higher boiling point fluid you can safely run a higher temp. Does that make sense?