Audi Q7 2007 !
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
Repair Group 15 – Cylinder head, valve gear
6
132
– If valve cotters have been removed from assembly car-
tridge -VAS 5161/8-, they need to be put into valve inser-
tion device -VAS 5161/18- first.
Larger diameter of valve cotters faces upwards.
– Insert valve spring and valve spring plate.
– Press assembly cartridge onto valve insertion device from
above and take up valve cotters.
– Re-insert assembly cartridge into guide plate -VAS 5161/
23-.
– Push pressure fork down and pull knurled screw upwards
while turning screw in both directions - this will insert the
valve cotters.
– Release the pressure fork with knurled screw still in pulled
position.
Installation is carried out in the reverse order; note the follow-
ing:
– Install glow plugs ⇒ Rep. Gr. 28.
– Install camshafts ⇒ page 123.
♦ Audi Q7 models with a 3.0 ltr. TDI engine are always
equipped with steel glow plugs.
♦ Engine is not to be rotated for approx. 30 minutes after in-
stalling camshafts. Hydraulic valve compensation ele-
ments have to settle (otherwise valves will strike pistons).
♦ After working on the valve gear, turn the engine carefully
at least 2 rotations to ensure that none of the valves make
contact when the starter is operated.
2.7 Valve dimensions
Inlet and exhaust valves must not be machined. Only grinding-
in is permitted.
Dimension Inlet valve Exhaust valve
∅ a mm 28.60 … 28.80 26.70 … 26.90
∅ b mm 5.968 … 5.982 5.958 … 5.972
c mm 97.25 … 97.45 97.35 … 97.55
α∠°45° 10' 45° 10'
Note
Note
Note
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