Clutch-driven cooling fan question.
I'm sure you have all noticed this. First thing in the mornings on a cold day, the first 50 yards you drive in your truck it sounds like the cooling fan is running Hyper-Speed or something. It never lasts beyond 25mph or so, but it seems like when I leave the neighborhood, that fan is pulling LOTS of air!
Is this because the clutch hasn't warmed up enough to work properly, or is this some of feature designed into the PCM? I figured since the fan has a thermostatically controlled viscous clutch, it needs a proper "warm up" to release the first time.
I thought about temporarily disabling the cluck somehow to make my fan run without the clutch feature. Of course this would cause lots of drag and therefor decrease gas mileage, but I just can kill the curiosity!
Does anyone have a diagram of how these fan clutches work or what's inside them?
The Black Beast 5.0
Better to Have Horsepower and not Need it, than to Need it and not Have it!
2000 Ranger Sport - 5.0L V8 - 8.8 LS rear