Audi Q7 2007
!
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
1 Removing and installing cylinder head
115
6
♦
If repairing, carefully remove any remaining gasket material
from the cylinder head and cylinder block. Ensure that no
long scores or scratches are made on the surfaces.
♦
Carefully remove any remaining emery and abrasive mate-
rial.
♦
No oil or coolant must be allowed to remain in the blind
holes for the cylinder head bolts in the cylinder block.
♦
Do not remove new cylinder head gasket from packaging
until it is ready to be fitted.
♦
Handle gasket very carefully. Damage to the silicone coat-
ing or the indented area will lead to leaks.
♦
The plastic protectors fitted to protect the open valves
should not be removed until the cylinder head is ready to
be fitted.
♦
When installing an exchange cylinder head with fitted cam-
shafts, oil the contact surfaces between the roller rocker
fingers and cams.
♦
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.
♦
Secure all hose connections with the correct type of hose
clips (same as original equipment)
⇒
Parts catalogue.
♦
Hose connections and hoses for charge air system must be
free of oil and grease before assembly.
♦
When fitting a new cylinder head or cylinder head gasket,
drain off all the old coolant and refill with new coolant.
Installation is carried out in the reverse order; note the follow-
ing:
–
Set crankshaft and camshafts to “TDC” before fitting cyl-
inder head:
•
Locking pin -3242- must be screwed in with crankshaft at
“TDC” position -1-.
•
The camshafts on both cylinder heads must be locked with
locking pins -T40060-.
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