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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?
 

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Your perfectly fine with your cooling method. You not going to hurt anything. Fans themselves do not cool the engine fast enough to do any cold seizure type of event.
 

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Realize that the Jeep 4.0 runs a bit warmer than most vehicles. Their normal temperature is 210 f.
Most vehicles run at 195 f.
So if your temp gauge is reading at 210 your fine. If it is indeed running too warm change out your thermostat.
If that isn't helping do a flush of the system.
 
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