Cooling System - Volkswagen Golf Diesel 2009 Mode D'emploi

Engine Cooling System
The engine uses a cross-fl ow cooling system. Engine
coolant fi rst fl ows to the front of the engine from
the coolant pump. The coolant is then distributed
along ducts and circulates around the cylinders. After
circulating through the cylinder head, the coolant
is routed back to the radiator via the thermostat
housing or recirculated through the coolant pump if
the thermostat is closed.
Coolant Expansion Tank
Engine Oil
Cooler
After-Run Coolant Pump V51
Note Vehicle coolant systems are
dependent on model equipment
installed. For vehicle specifi c
information, please consult the
relevant Repair Manual.

Cooling System

The heat exchanger and turbocharger are part of
the engine cooling circuit. The engine oil cooler is
connected directly to the cylinder block through its
mounting subframe.
After-Run Coolant Pump V51 protects the
turbocharger bearings from overheating after engine
shut-off.
The pump is activated by the engine control module
based on programmed characteristic maps.
Heat Exchanger
Turbocharger
Thermostat/Coolant
Pump Module
Radiator
Coolant Outlet from
Cylinder Head to
Heat Exchanger
Coolant
Pipe
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