|
The non-air conditioned that have a solid hub is just another way of saying it does not have a clutch. I'm learning more about this thing as time goes on. More than I planned for.
Heat is the controlling factor as to when your engine is hot enough to need the fan on. Some use a spring and others depend on oil inside. I guess it's like an old thermostat switch. Here is what my Haynes Repair Manual for Buick, Oldsmobile and Pontiac full-size models says. 1970-1990
Most vehicles in this manual have thermostatically controlled fan clutches. Some non-air conditioned models are equipped with solid-hub type fans. Here is how it says to check it.
Start with a lukewarm engine. Run it for two minutes only. Turn the fan and note the resistance. Drive the car to heat it up and check the resistance again. You should note an increase. If the fan clutch fails the check or is locked up you need to replace it. If it has a fluid leak or there is lateral play over a 1/4 inch then replace.
To replace it just says to remove upper fan shroud. Remove fasteners holding the fan assembly and unbolt the fan from the clutch. To put on a new one reverse the process. Do not try any short cuts. I learned the hard way. Good luck with it.
|