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Old 06-14-2002, 11:03 PM
ke6dcj ke6dcj is offline
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Join Date: Apr 1999
Posts: 2,632
The "roar" test is also known as the viscous fan test.

Based upon temperature and RPMs, the viscous fan is suppose to engage at x-degrees and y-RPM, and disengage at z-RPM.

Viscous-Fan coupling airflow temp: 92-100C
Safety Cut-off Fan Speed: 4500, engine RPM 3250

Also, it's called a "roar" test because if it's hot outside and in the engine-bay, once you hit about 3500 RPM the viscous fan should be engaged and you'll hear the "roar" of the fan.

:-) neil
1988 360TE AMG
1993 500E

Last edited by ke6dcj; 06-14-2002 at 11:10 PM.
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