2000xp8 said:Well, the fan is on a clutch that always has some tension.
Check to see how easy it spins when the car is cold (and off).
If you spin it, just a few blades should pass after you let go.
But, with new fan clutches only being $50-$100, if you have any real doubts, buy a new one, becaue if that thing is locked up, it will almost tear the water pump off the car. I've seen it lock up, come off, and go through the radiator.
PurpleStripes said:If your's still sounds like a jet after fifteen seconds during a cold start up, then I would call it bad.
hllon4whls said:My 250 sounds like it will take off when the fan clutch is cold. After a couple of blocks, it settles down.
HISSIN50 said:Sam, well said. I can tell ya that the Imperial HD clutch is very tight. That is just what I wanted - ambient temps here are hot. I agree that the clutch is likely robbing some HP, but it is a compromise that I am definately willing to make.
FWIW, that clutch with a metal replacement fan sounds like a jet engine (people have thought it was a blower).
hllon4whls said:My dad filled his 8 clutch with silicone. It was an 8 blade plastic fan. 4 speed with 4.56 gears. People would stop on the streets and look to see what was coming. Good ole 77 chevy luv half breed isuzu.