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Fan clutch stuck?
I'm trying to decide if my fan clutch is bad on my auto 2002 7.3. (I've been battling potentially slightly poor fuel fuel economy, but a lot of it is really short trips~5-10 miles in a really hilly area.)
Anyway, I don't think I've ever heard the "woosh" when really lugging/loading the engine from the fan "kicking up/on". When I try to turn the fan by hand, I can spin it, but it definitely has resistance, i.e. I can't push it and have it spin on its own, and I have to push it pretty good to get it moving. It feels like its "always on". It also take a long time to warm up, so I'm wondering if the fan clutch is going bad...
My question is, how do you tell without doing the test which requires measuting fan rpm versus engine rpm at different temps (I don't have a tool to measure fan rpm). When its fully warmed up and idling versus fully cold, should the van ever be not spinning? I..e can I warm it up fully and then pop the hood at idle and see if the fan is stopped/moving very slowly? It always seems like its moving a decent amount of air.