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Old September 28th, 2019, 19:00
bradleyheathhays bradleyheathhays is offline
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Cooling your engine down with fans

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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Old September 29th, 2019, 20:09
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Anak Anak is offline
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Re: Cooling your engine down with fans

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.
Project "Scope Creep": 1996 4wd 4.0L, AX15

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Old September 30th, 2019, 17:39
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cal cal is offline
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Re: Cooling your engine down with fans

An easier fix is the time delay relay.
I'm not a complete idiot - there are parts missing.
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Old October 5th, 2019, 19:45
smccollamjr smccollamjr is offline
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Cooling your engine down with fans

If the engine turns over slower when itís hot your starter might be going bad.
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