Tiguan 2016 ➤, Tiguan 2021 ➤, Tiguan RUS 2017 ➤, Tiguan RUS 2021 ➤
Maintenance - Edition 12.2020
– Carefully loosen banjo bolt -arrow- until water escapes.
The water is drained from the diesel fuel filter due the system
pressure.
– When diesel fuel escapes, tighten banjo bolt, and pull off
hose.
– Tighten banjo bolt to specified torque.
Specified torque
Banjo bolt
Nm
8
4.32
Diesel fuel filter: renewing
CAUTION
Risk of burns from very hot fuel.
♦ In extreme cases the fuel lines and the fuel can reach a
temperature of 100°C. Allow the fuel to cool down before
disconnecting the lines – risk of scalding.
♦ Wear protective gloves.
♦ Wear safety goggles.
Risk of injury due to highly-pressurised fuel.
♦ To release pressure in fuel system, place clean cloth
around connection and carefully undo connection.
Special tools and workshop equipment required
♦ Protective gloves
♦ Safety goggles
Note
Observe relevant disposal regulations.
Removing
NOTICE
♦ Ensure that no diesel fuel contacts other components in
the engine compartment. Clean immediately, if necessary.
– Switch off ignition.
Note
Before opening the system, place a cloth around the filter hous‐
ing.
– Unscrew bolts -arrows- in sequence shown -1- to -5-.
– Collect any escaping fuel.
– Remove upper section of fuel filter -1- from fuel filter housing
-2-.
– Place upper part of fuel filter -1- to one side (with fuel lines
connected).
92
4. Descriptions of work
Tiguan 2016 ➤, Tiguan 2021 ➤, Tiguan RUS 2017 ➤, Tiguan RUS 2021 ➤
Maintenance - Edition 12.2020
– Remove filter element -1- from fuel filter housing -2-.
Installing
– Always moisten new seal slightly with diesel fuel to avoid
malfunctions!
– Insert filter element -1- centrally into fuel filter housing -2-.
Continue installation in reverse order of removal.
Specified torque
Nm
5
Bolts for filter housing
4. Descriptions of work
93
Tiguan 2016 ➤, Tiguan 2021 ➤, Tiguan RUS 2017 ➤, Tiguan RUS 2021 ➤
Maintenance - Edition 12.2020
NOTICE
To prevent the high-pressure pump from running while it is
empty (very tight tolerances) and to ensure that the engine
starts quickly after parts have been renewed, it is important to
observe the following:
♦ If components of the fuel system between the fuel tank and
the high-pressure pump have been removed or renewed,
the fuel system must be filled and bled before the engine is
started for the first time.
Bleeding fuel system
•
There must be sufficient fuel in the tank.
– Activate fuel pump ⇒ page 31 .
– After the fuel system has been bled, start engine.
– Allow engine to run for several minutes at mid revs, then
switch engine off again.
– Read event memory and erase if necessary.
– Carry out a leakage test of the fuel system.
Note
If there is still air in the fuel system, the engine can change to
emergency running mode during road test. In this case, switch
the engine off and erase the fault memory. Then continue with
the road test.
4.33
Air filter: cleaning housing and renew‐
ing filter element
Air filter element: removing and installing, 1.4 l TSI engines ⇒
page 95
Air filter element: removing and installing, 1.5 l TSI engines ⇒
page 97
Air filter element: removing and installing, 2.0 l TSI engines ⇒
page 98
Air filter element: removing and installing, common rail engines
⇒ page 98
Air filter element, common rail engine, engine code CUAA: re‐
moving and installing ⇒ page 100
Special tools and workshop equipment required
♦ Torque screwdriver -VAS 6494-
94
4. Descriptions of work
2024 VW Tiguan Owner's Manual
