I have a resonation around 2500. Stationary and whilst driving.
I have previously replaced the fan (sold as Hella but received boxed as Britpart) as it was hitting a coolant pipe and split the blades and the coolant pipe.
The resonation was there prior too.
If I hold the fan and run the engine I’m almost certain the resonance disappears.
If you watch the fan at idle you can see its not spinning perfectly true, is this normal or possibly the cause of my problem?
The drive belt pulley appears to run true but I am half tempted to swap the water pump in case it’s that.