Quote:
Originally Posted by dieselfuel007
really don't want to change my fan clutch just yet its a gm heavy duty i bought nos and it was really expensive
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That fan clutch should be more than up to the task. You might also consider sealing the shroud to the radiator; there's a recent thread here somewhere....
If you really feel the need to upgrade to a severe duty fan clutch, Hayden lists a few comparisons.
https://www.haydenauto.com/en/produc...-types/thermal
Heavy Duty
Turns the fan 70-90% of the shaft speed when engaged for increased cooling
Turns the fan 25-35% of the shaft speed when disengaged
Used with deeper pitch fans (2-1/2” of pitch)
Land and groove design with up to 27 sq. in. of working surface
Identified by finned aluminum faceplate and thermal spring on the front
Severe Duty
Turns the fan 80-90% of the shaft speed when engaged
Turns the fan 20-30% of the shaft speed when disengaged
Used with deeper pitch fans (2-1/2” of pitch)
Land and groove design with up to 72 sq. in. of working area
Larger working surface provides cooler running and longer life expectancy
Thicker body and deep finned faceplate dissipates more heat
Can be used in place of many heavy-duty clutches