TSB : Viscous Fan
Engine Mechanical
Details
The viscous drive unit for the engine cooling fan, provides a means of controlling the speed of the fan relative to the running temperature of the engine. The viscous unit is a type of fluid coupling, which drives the fan blades through the medium of a special "silicone fluid", injected into the unit during manufacture. See Fig 1 . Fig 1: Identifying Viscous Fan Courtesy of LAND ROVER NORTH AMERICA, INC.
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