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
85
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:
FOX 2004 ➤
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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
87
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
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