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  #1  
Old 01-13-2007, 04:40 PM
PanzerSD's Avatar
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Location: Saskatchewan Canada
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Exclamation Coolant/Block heater ?

Can having weak coolant effect the efficiency of a block heater?

I checked my coolant and it's only good to -25*C!!!!! it sat for two days at -30*C and colder. The block heater was less than effective during those two days, I'm lucky my block didn't crack, although, I'm sure the block heater at least prevented the coolant from freezing....
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  #2  
Old 01-13-2007, 07:10 PM
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I don't think it would have any effect at all. Coolant simply raises the boiling temperature and lowers the freezing temperature. To my knowledge it has no effect on the abiity of the liquid to absorb heat.

Here's an interesting aside: you know the pink coolant used in RV pipes? The stuff freezes! However, it's value is found in the fact that it does not expand when it freezes.
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Old 01-14-2007, 12:15 AM
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Water is a better conductor of heat than anti-freeze. It would (theoretically) heat the engine better if you had no anti-freeze at all, but obviously that is a bad idea for other reasons.

Perhaps your thermostat is stuck open and you're losing some heat to the radiator?
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