Fuel filter for diesel engine with a working volume of 1.9 l (VW Polo 4)

1 — return fuel line
From the high-pressure fuel pump. Blue or, accordingly, with blue markings.

2 — fuel supply line
To the high-pressure fuel pump. White or, accordingly, with white markings.

3 — clamp*

4 - control valve
Installation position: the arrow must point towards the fuel tank. When replacing the filter, remove the clamp and remove the control valve together with the attached hoses.
At temperatures below +15°C: the fuel flow through the filter is open.
At temperatures above +31°C: the fuel flow through the filter is closed.

5 — return fuel line
To the fuel tank. Blue or with blue markings.

6 — fuel supply line
From the fuel tank. White or with white markings.

7 - fuel filter
Fill to the brim with diesel fuel before installation.

8 - seal
Replace if damaged.

9 - water drain plug

10 — bolt, 25 Nm

11 — fuel filter holder

12 - insert

*) ensure the strength of the fastening