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Viscous clutch fan
Posted:
Sat Jul 20, 2019 2:05 pmby h20hamelan
a Volvo red block fan seems to fit, it pulls more air too.
i drive at speed all the time, but...
and i haven't upgraded the electrical yet, and i suppose the viscous might look cleaner. Also, I don't care for front mounted pusher fans as they block too much airflow?
Re: Viscous clutch fan
Posted:
Sat Jul 20, 2019 2:18 pmby bitsobrits
I would avoid hanging any kind of mechanical fan off the front of the water pump. With no fan and a properly adjusted fan belt (not too tight) water pump bearings can lead a decently long life. With a heavy viscous fan I believe you would be shortening the life of the notoriously undersized pump bearings.
Re: Viscous clutch fan
Posted:
Sat Jul 20, 2019 3:36 pmby h20hamelan
ah, right. good point
Re: Viscous clutch fan
Posted:
Sat Jul 20, 2019 8:13 pmby Fred Talmadge
I have a 2 bladed fan, as I heard that you should have some load on the pulley to keep the bearing from skipping.
Re: Viscous clutch fan
Posted:
Sat Jul 20, 2019 8:41 pmby StressCraxx
Fred Talmadge wrote:I have a 2 bladed fan, as I heard that you should have some load on the pulley to keep the bearing from skipping.
Hello Fred,
I think that's a reasonable concern, but I think the belt tension provides enough load on the WP bearing to prevent ball/roller skid. If the bearing was skidding, it would fail in a matter of days/weeks.
Regards,
Dan Wise