BMW N55 Manual page 78

The following graphic shows the connection of the auxiliary radiator to the cooling sys-
tem. The auxiliary radiator is connected to the radiator by means of parallel coolant lines,
thus increasing the cooling surface area. This system is combined with an oil-to-coolant
heat exchanger mounted on the oil filter housing. (See component "C" in the previous
graphic.)
N55, auxiliary radiator
Index
1
2
3
4
5
6
Note: If a separate oil to air cooler is not installed, an auxiliary radiator in
conjuction with an oil to coolant heat exchanger is used to cool the
engine oil.
78
N55 Engine
Explanation
Radiator
Auxiliary Radiator
Feed connection to the auxiliary radiator
Feed connection at the auxiliary radiator
Return connection to the auxiliary radiator
Return connection from the auxiliary radiator