Quote:
Originally Posted by hatzie
VAG Gruppe vehicles from the 70's & 80's switched the radiator fans on when the radiator temp reached 205°F.
If the heads are 10°F hotter then you want a thermal switch in the heads to switch somewhere between 215°-220°F.
You also want to switch the fans on with the AC compressor.
50:50 Coolant mix at 0psi boils at 220°F. With a properly sealed system and a 16psi cap it boils at 250°F.
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Thank you. That's the kind of info I was looking for.