Removing and installing glow plugs Q10/Q14: VW 2.5 TDI (AXD, AXE, BLJ, BNZ, …)

Removing and installing glow plugs
Q10
/
Q14
Special tools and workshop equipment required
U/J extension and socket, 10 mm
3220
Torque wrench
V.A.G 1331
Prerequisites
Engine is cold
Ignition switched off
Caution
Ceramic glow plugs are sensitive to knocks and bending. For this reason a glow plug which has dropped even just from a small height (approx. 2 cm) must not be used anymore. Even if no damage is apparent. It is absolutely necessary to follow the installation instructions, otherwise the heater pin of the glow plug can break and cause engine damage.
Transport and store only in original packaging or packed separately in bubble wrap.
Only remove ceramic glow plugs from their packaging immediately before installing them.
If there is any doubt as to the condition of the ceramic glow plugs, they should be renewed without exception.
Damaged ceramic glow plugs (e.g. heater pin of the glow plug is damaged) will invariably cause engine damage.
If the heater pin of the glow plug is damaged, the fragments must be removed from the combustion chamber before starting the engine for the first time, otherwise this will invariably cause mechanical damage.
Do not oil or grease thread of cylinder head bore or of ceramic glow plugs.
It is not permissible to install a combination of ceramic and metallic glow plugs.
Removing
Move lock carrier to service position
General body repairs, exterior
Rep. gr.
50
Body - front; Lock carrier - service position
.
Note
If only
glow plug 1
Q10
or
glow plug 5
Q14
are removed, the intake manifold does not need to be removed.
Vehicles with engine codes BNZ and BPC:
Remove intake manifold
Chapter
.
Continuation for all vehicles:
Clean area around glow plugs.
Note
Cleaning procedure:
Use a vacuum cleaner to remove coarse dirt.
Spray brake cleaner or suitable cleaning agent into glow plug port, let it work in briefly, and blow out with compressed air.
Then use an oil-soaked cloth to clean the glow plug port.
Pull connectors off glow plugs.
Remove glow plugs
Q10
/
Q14
using
U/J extension and socket, 10 mm
3220
.
Distinguishing characteristics of glow plugs:
Glow plug
Colour code
Ceramic glow plug
White
Metal glow plug
Red, black or green
Installing
Installation is carried out in the reverse order; note the following:
Before installing, completely remove any deposits from cylinder head bore and thread. It must be ensured that no dirt falls into the cylinder.
Always perform a test on all glow plugs after their installation and before initial start of the cold engine
Vehicle diagnostic tester
.
Specified torques
Chapter
“
Assembly overview - intake manifold
”