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Old 08-30-2001, 05:11 PM
Ali Al-Chalabi's Avatar
Ali Al-Chalabi Ali Al-Chalabi is offline
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Join Date: Nov 2000
Location: Knoxville, TN
Posts: 1,837
The aux fans have two speeds, low and high

Low switches on when the A/C pressure gets to a certain limit.

High is on when coolant temp hits 107C

Regardless of the fact that you are using 10w-40, there should still be good pressure at idle.
Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record
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