- 1 - fan blade;
- 2 - viscous clutch axis - with a six-cylinder engine with a large hexagonal mounting bolt;
- 3 - viscous adhesion.
To save power, this fan is equipped with a so-called viscous coupling. It turns on the fan at an ambient temperature of 82°C. This is done by means of a bimetallic strip, which, being temperature dependent, lets viscous silicone oil through the valve into the working space of the viscous clutch. The oil creates a force circuit between the belt pulley and the fan - the fan supplies cool air. At temperatures below 60°C, silicone oil returns from the working space to the collector - the fan rotates at a lower speed, without consuming power.
Removing the viscous fan
Dismantling the viscous fan of a six-cylinder engine: to loosen the fan mounting bolt, you need to block the belt pulley: into the hole (2) insert a screwdriver and rest against the bracket (1).
The same process that is described in the dismantled engine on the left is shown here in the car. Screwdriver is inserted into the hole (2) and rests on the bracket (1). You can unscrew the bolt (3).
Removing the viscous fan with a four-cylinder engine: belt pulley (1) locked with M5 X 60 bolt (2), the fixing bolt can be unscrewed with an 8 mm Allen key (3).
Order of execution
1. Four-cylinder engine: use a wrench to unscrew the fixing bolt with an 8 mm Allen key in the rear of the fan bearing. Block the belt pulley by inserting the M5x60 bolt.
2. Remove the viscous fan.
3. Unscrew the clutch from the fan.
4. When installing, tighten the bolt to 70 Nm.
5. Tightening torque of the fan at the clutch: 10 Nm.
6. Six-cylinder engine: Loosen the fan mounting bolt (it is also the axis of the fan) wrench SW 32.
Attention: left-hand thread! Block the belt pulley with a screwdriver. The screwdriver rests against the bracket provided for this.
7. Remove the viscous fan.
8. Unscrew the viscous clutch on the fan.
9. When installing, tighten the bolt to 70 Nm.
10. Tightening torque of the fan on the clutch: 10 Nm.
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