Volkswagen Fox (2004 year). Manual - part 53

– Remove the dust and pollen filter -arrow- with the filter support.
– Separate the filter from its support.

WARNING

♦ Follow the rules for disposal!

– Installation is performed in the reverse sequence to the re‐

moval.

4.34

Timing belt - replace; Semi-automatic

camshaft tensioning pulley - check

4.34.1

Engine identification letters ASY

head, camshaft mechanism .

4.34.2

Engine identification letters BNM

head, camshaft mechanism .

4.35

Camshaft activation timing belt - check

4.35.1

Engine identification letters AQZ, BAH,

BLH, BKR, BMD, and CFZA

– Remove the upper mechanical distribution cover.
– Check the timing belt condition for:
♦ Tears, section fractures.
♦ Layer separation (timing belt body, cord strands).
♦ Fracture in the timing belt body.
♦ Unthreaded cord strands.
♦ Surface tears (plastic coating).
♦ Oil and grease residues.

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4. Service descriptions    

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If there are faults, you must replace the timing belt. This will avoid

failures and faults during operation.

When checking the timing belt condition, pay special attention to

the following damage:
A - Tears (on the cover side).
B - Side wearing.
C - Unthreading.
D - Tears (at the teeth base)

4.36

Air filter - clean the case and replace the

filter element

4.36.1

Engine identification letters BAH and

BLH

Carry out work sequence as follows:
– Remove the crankcase air vent hose -1- from the air filter case.
– Remove the air filter case from the supports and the Butterfly

valve command unit from the accelerator -J338- -arrows- and

remove the air filter case.

– Remove the air filter case fastening screws -arrow-.
– Remove the filtering element.

WARNING

♦ Follow the rules for disposal!

– Clean the filter's case and install a new filtering element.
– The installation is performed in the reverse order from remov‐

al.

4.36.2

Engine identification letters AQZ and

BKR

Carry out work sequence as follows:

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    4. Service descriptions

valve command unit and, then, from the front supports -arrow-.

– Remove the air filter case fastening screws -arrows-.
– Remove the filtering element.

WARNING

♦ Follow the rules for disposal!

– Clean the filter's case and install a new filtering element.
– The installation is performed in the reverse order from remov‐

al.

4.36.3

Engine identification letters ASY, BNM,

BMD, and CFZA

Carry out work sequence as follows:
– Loosen the screws -arrows- and remove the air filter cover.
– Clean the filter's case and install a new filtering element.
– The installation is performed in the reverse order from remov‐

al.

4.37

Fuel filter - replace

4.37.1

Engine identification letters AQZ, BAH,

BLH, and CFZA

⇒  Engine - Supply and ignition system; Rep. Gr.  20 ; Supply

system - reservoir, fuel pump

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4. Service descriptions    

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Engine identification letters ASY

Note

♦

Make sure that the fuel does not reach the cooling system ho‐

ses. If necessary, clean the hoses immediately!

♦

Do not dispose of the fuel filter with fuel inside.

♦

Comply with the waste disposal standards!

Carry out work sequence as follows:
Removal
– Remove the fastening clip -3- and remove the regulating valve

-4- with the fuel ducts connected.

– Disconnect the fuel hoses -1- and -2-.
– Unlock the -arrows- hooks.
– Remove the fuel filter cover upwards.
Installing
– Fill the new filter with new diesel fuel. Thus, the engine works

faster.

– Install the new sealing ring to seal the regulating valve.
– Install the filter.
– Lock the -arrows- small hooks.
– Assemble the regulating valve -4- with the ducts connected.
– Install the fastening hook -3-.

– Install the fuel hoses -1- and -2- and lock with hose clamps.

Note

The fuel flow direction is marked by -arrows-: (Do not invert the

connections).

4.37.3

Engine identification letters BNM

Note

♦

Make sure that the fuel does not reach the cooling system ho‐

ses. If necessary, clean the hoses immediately!

♦

Do not dispose of the fuel filter with fuel inside.

♦

Comply with the waste disposal standards!

Carry out work sequence as follows:

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    4. Service descriptions