Fan Clutch question..
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
Certainly adding an A/C condenser in front of the radiator would increase coolant temps somewhat. Even with the A/C OFF, the airflow will be diminished a bit and the temps will go up a few degrees. With the A/C ON, it could increase 10-20*F.
P.S. Changing the thermostat will not achieve any drop in coolant temps; doing so will lengthen the time it takes to reach 'operating' temps...but not change what they are. To lower temps, you will need to improve airflow through your radiator set up and/or increase capacity of the radiator.
P.S. Changing the thermostat will not achieve any drop in coolant temps; doing so will lengthen the time it takes to reach 'operating' temps...but not change what they are. To lower temps, you will need to improve airflow through your radiator set up and/or increase capacity of the radiator.
Thread Starter
Drifting
Joined: May 2002
Posts: 1,546
Likes: 282
From: Back in Nebraska
Certainly adding an A/C condenser in front of the radiator would increase coolant temps somewhat. Even with the A/C OFF, the airflow will be diminished a bit and the temps will go up a few degrees. With the A/C ON, it could increase 10-20*F.
P.S. Changing the thermostat will not achieve any drop in coolant temps; doing so will lengthen the time it takes to reach 'operating' temps...but not change what they are. To lower temps, you will need to improve airflow through your radiator set up and/or increase capacity of the radiator.
P.S. Changing the thermostat will not achieve any drop in coolant temps; doing so will lengthen the time it takes to reach 'operating' temps...but not change what they are. To lower temps, you will need to improve airflow through your radiator set up and/or increase capacity of the radiator.
Race Director
Joined: Mar 2006
Posts: 14,112
Likes: 28
From: Florida
The temperature and amount of ambient air are the biggest factors in heat rejection and you are raising the air temperature available to the radiator.
Hayden makes almost all the replacement clutches, they also have heavy duty and severe duty. I would get one from a 75 or 77 w/ a/c. Most parts store have them.
Clutches do loose performance over time.
The way they are tested on Bimmers is to roll up a newspaper and carefully press it against the running fan on the driver's side (not jam into it), a good heated clutch will be hard to stop or slow and a poor one will slow down or stop easily.
Of course if you want to try this method, be very carefull at your own risk.
