cold weather grill/ radiator cover - Diesel Forum -
6.9L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

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post #1 of 4 (permalink) Old 11-13-2005, 12:27 AM Thread Starter
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cold weather grill/ radiator cover

Why do (most?) big rigs cover their grills in the winter? Faster warm up, warmer operating temp, other?

Is there any benefit for us in doing so?

I tried a quick search but found nothing.


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post #2 of 4 (permalink) Old 11-13-2005, 02:09 AM
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Re: cold weather grill/ radiator cover

When it's -40F my engine needs all the help I can give it. A grill cover is cheap cutting down the cold air being driven into the rad at highway speeds.

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post #3 of 4 (permalink) Old 11-13-2005, 05:23 AM
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Re: cold weather grill/ radiator cover

For us here in the midwest we use them so that the heater works faster. No you don't need on here in the midwest but like I said it sure makes the heat come on much faster. In The Enterprise it cut the time until I had heat in less than half - I hate the cold so for me this was a good thing.

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post #4 of 4 (permalink) Old 11-13-2005, 06:28 PM
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Re: cold weather grill/ radiator cover

Well typically a good running/maintained diesel engine runs pretty cool, so in the winter when its 10 degrees out and colder the motor really cant get up to proper operating temp. and besides have you ever acctually seen how big a big truck Rad is?? ITS HUGE! so if your runnin at 65 when its 10 degrees out the coolent can acctually get too cool, and ruin a motor. I know up here in NY i'll be run'n a cover to keep my truck runnin warm this winter!

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