I have seen some additive advertised to add to your coolant. They say it will drop the temp 20 to 30 degrees. has anyone ever used this stuff. My truck tends to run a little hot during the summer especially in traffic and i am wondering if this is an easy fix or just another scam.
RedLine Water Wetter is probably the best known. The catch is the 20 degree difference is only good with 100% water, not a 50/50 antifreeze mix.
With antifreeze you only get a 7 to 10 degree drop in temp. This will help, but if you really want to get the R to cool better, I would change the fan to Mike in AZ's unit, or get a program to change the on/off temps.
If you reprogram the tune for a lower turn-on temp, please consider the following settings. They are the cleanest/best to fit within all operating systems and with all hardware. Including the OEM fan and both of mine.
Low speed on at 210, off at 200.
High speed on at 220, off at 210.
With a stock thermostat, the system will regulate between 195 and 200 on the gauge. This is the same signal that is used for the fan turn-on temps.
By setting the fan at 210, you will allow the thermostat to do its part in regulating engine temperature. The fan will kick on only when the thermostat gets wide open...... perfect.
You might see a little fluctuation on the gauge, but your main fan won't be blaring all the time. This lets each of the cooling functions (t-stat, low spd and hi spd) do its job.......
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