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Cooling your engine down with fans

bradleyheathhays

NAXJA Forum User
Location
Lexington, KY
This may sound like a stupid question, as I'm prone to ask sometimes. But...I drive a '96 Cherokee with the inline 4.0 non-interference engine and it doesn't like driving in the heat so much. Since I'm a car down right now I'm driving it a LOT more than I used to. After a lot of driving in this hot weather it starts slower, but still starts and runs ok.

So to help it out I've been raising the hood and putting 2 box fans right on top of the engine to help it cool. I hadn't thought about it but my Mom asked if cooling it down too quickly could be bad for the engine. And since I don't know I thought I'd ask here.

Any harm in using my method to cool an engine down much more quickly than normal?
 
I don't think you will get into trouble with a pair of box fans.

Where you can really mess up a hot engine is if you add cold water to an overheated block. I believe it is possible to get enough of a temperature differential to crack cast iron in that situation. But I don't think you are going to get anywhere near that with air from a couple of fans.
 
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