Audi Q7 2007 Workshop Manual page 121

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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-.
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
1 Removing and installing cylinder head
Audi Q7 2007 !
6
115