Yes, Hayden is one of the best IMHO. Can't say 'yea or neigh' on the
rapid-cools, I've always used the regular style (biggest model, made for
Class A motorhomes towing up to 10,000#) with great results.
On my current truck, on a 90* day, A/C cranked, mountainous roads with long
inclines, cooler feed-line temps went from 200-210* to 140-150*.
On my 89 S-10, I had persistent heating problems. It finally
got so bad one time that the transmission boiled and blew fluid out of
the vent. After that, I aggressively started working to cool the truck
First I installed a transmission cooler. I used whatever Pep
Boys was selling that fit into my truck. No special rapid cool, etc.
Next I repalced the 195* thermostat with 180*. I used to swap
them winter and summer, but then I just left the 180 in all the time.
Its ok, and I only lost 1 MPG.
Finally, I replaced the radiator. THe OEM radiator looked ok,
and it wasn't leaking, but the Modine I installed made quite a
difference. I guess a few of the little channels were blocked, and
with a radiator that small trying to cool the 4.3 liter, there was no
room for error.
After replacing those parts, I haven't had any problems in
50,000 + miles. I never did get around to putting an electric fan.
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