BMW E39 viscous fan 32 mm nut removal
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Which way does the E39 viscous fan 32 mm nut loosen?
The thread is left-handed. The nut loosens by turning it to the right when looking at the car from the front.
How do I loosen the viscous fan nut when the pulley just spins?
Hold the pulley in place, for example with a wooden wedge between the belt and the pulley, or by pushing a ring spanner between the bolts of the flex disc. The nut often loosens with firm hammer blows on the handle of the 32 mm spanner. Locking is not always necessary.
Is it normal for the viscous fan to keep spinning?
The viscous fan basically always spins. When cold it does not lock up, so the rotation is slow and it can be stopped by hand. Do not touch the fan when it has warmed up.
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