Diagnosing fan clutch issue (before I spend $600)
Temperatures are dropping close to freezing where the bus is. On a test run I noticed that the fan was spinning very fast as soon as the engine started.
From what I understand they should be free spinning until a certain temperature, and I would expect that temperature to be well above freezing.
With the engine cooled down, when I spin the fan. It feels fairly free for about half the rotation, and then is much stiffer for about another half. I can still spin it however.
New fan is 900CAD from International, 500CAD from an aftermarket vendor. They must use unobtainium as the viscous fluid.
Before I replace, does my analysis make sense. Other things I can try? Most online content cover clutches that never engage. I will have good cooling, but lose power.