Removal and installation of cooling system components (VW Tiguan 1)

Caution: When performing installation work, especially in the engine compartment due to its dense layout, the following rules must be observed. All types of lines (for example fuel, hydraulic, activated carbon absorber, cooling system, air conditioning system circuit, brake system, vacuum), and electrical wires must be laid as they were originally laid. To avoid damage to hoses, tubes or wires, ensure sufficient space when working on all moving or hot components. When the engine is warm, the cooling system is under pressure. Release the pressure before carrying out repair work. Spring clamps are used to connect the hoses. Only use spring clamps when carrying out repairs. For installing spring clamps, we recommend using the hose clamp pliers -VAS 6340- or the spring clamp pliers -MS 5024A-. Before installation, freely position the cooling system hoses so that they do not come into contact with other parts (take into account the markings on the hose and the connection point).

Cooling system components from the body side

• 1 - Radiator, after replacement change the coolant
• 2 - Sealing ring, replace if damaged
• 3 - Pipe, to remove, disconnect the clamp
• 4 - Spring clamp. Remove and install with hose clamp pliers -VAS 6340-
• 5 - Cooling system hose
• 6 - Cooling system hose, upper, to the nipple on the cylinder head
• 7 - Expansion tank, check for leaks
• 8 - Connector
• 9 - Plug, check for leaks, the safety valve should open at an excess pressure of 1.4...1.6 bar
• 10 - 5 Nm
• 11 - Plastic inserts for mounting screws
• 12 - Bracket
• 13 - 5 Nm
• 14 - Air intake with radiator fan "V7" with radiator fan control unit "J293". When replacing the radiator fan "V7" and the air intake, they may only be replaced as a set. Heat shields must be installed to prevent damage to the radiator grille due to the thermal energy of the exhaust system. Tightening torque of heat shields: 3 Nm
• 15 - Bracket for connector
• 16 - Connector
• 17 - Clamp bracket
• 18 - Cooling system hose, lower, to thermostat fitting
• 19 - Routing hoses
• 20 - Radiator outlet coolant temperature sensor "G83"
• 21 - Cooling system hose, lower, to thermostat fitting
• 22 - Pipe, to remove, disconnect the clamp

Engine side cooling components associated with thermostat

• 1 - Branch pipe
• 2 - O-ring, replace
• 3 - Pressure spring
• 4 - Pusher, do not tilt it when installing
• 5 - Thermostat. Do not mix up the thermoelements! Start of opening: thermoelement (bottom drawing): 80°C, thermoelement (top picture): 96°C
• 6 - Coolant temperature sensor "G62", before removing, if necessary, relieve pressure in the cooling system
• 7 - Clamp bracket, check for secure installation
• 8 - Thermostat housing, 10 Nm
• 9 - O-ring, replace
• 10 - To the expansion tank
• 11 - Branch pipe
• 12 - Cooling system pipe, to remove, remove the thermostat housing, to remove, remove the compressor
• 13 - Cooling system pipe, to remove, remove the thermostat housing, to remove, remove the compressor
• 14 - 5 Nm
• 15 - From the bottom of the radiator
• 16 - To the top of the radiator

Cooling system hose connection diagram

• 1 - Expansion tank
• 2 - Intake manifold
• 3 - Heat exchanger heater
• 4 - Thermostat housing
• 5 - Engine oil cooling radiator
• 6 - Radiator
• 7 - Coolant circulation pump "V50"
• 8 - Turbocharger
• 9 - Cylinder head and cylinder block, after replacing the heat exchanger, replace the coolant
• 10 - Autonomous heater, additional equipment