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N62 Engine
Transmission Oil/Coolant Heat Exchanger
The transmission oil/coolant heat exchanger ensures that the transmission oil is heated up
quickly and also that it is appropriately cooled. When the engine is cold, the transmission
oil/coolant heat exchanger thermostat switches into the engine's recirculated coolant cir-
cuit. This allows the transmission oil to heat up as quickly as possible (with the engine
coolant).
When the return flow water temperature reaches 82 ºC, the thermostat switches the trans-
mission oil/coolant heat exchanger to the low-temperature coolant radiator circuit (refer to
the cooling circuit diagram) to cool the transmission oil.
Electrically Operated Fan
The electric fan is integrated in the cooling module and is mounted directly in front of the
radiator. The speed is regulated by the ECM.
Viscous Coupling Fan
The viscous coupling fan is driven by the water pump. The noise output and the perfor-
mance of the fan coupling and the fan wheel have been optimized as compared with the
E38M62. The viscous coupling fan is used as the final level of cooling and switches on at
an air temperature of 92 ºC.
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Downloaded from www.Manualslib.com manuals search engine 47
N62 Engine
Flywheel
The lightweight flywheel is made from a laminated plate. The
starter ring gear is also the increment wheel for engine speed
and crankshaft positioning/misfire detection.
The ring gear is riveted directly to the flexplate (6). The fly-
wheel diameter is 320 mm.
Vibration Damper
The vibration damper is a torsional vibration absorber (axial
design). The outer edge of the damper has a notch (1) to
accept the locating tool when positioning the crankshaft for
initial setting.
The locating tool inserts into the raised mount in the front
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Engine Mounting
The engine is secured by two hydraulic damping mounts that are located on the front axle
carrier (structure and function are the same as the E38/M62).
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