Audi Q7 2007 Workshop Manual page 133

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Note
The retaining frame is shown without camshafts for illustra-
tion purposes.
–
Turn retaining frame upside down.
–
Apply the beads of sealant -arrows- onto the clean sealing
surfaces of the retaining frame as illustrated.
•
The grooves -arrows- on the sealing surface must be com-
pletely filled with sealant.
•
The beads of sealant must project 1.5 ... 2.0 mm above
the sealing surface.
Note
The sealant beads must not be thicker than specified, oth-
♦
erwise excess sealant could enter the camshaft bearings.
The retaining frame must be installed within 5 minutes af-
♦
ter applying sealant.
–
Ensure that all roller rocker fingers contact the valve ends
and compensation elements correctly.
–
Fit retaining frame together with both camshafts and
bracket -T40095- onto cylinder head.
Note
After installing the retaining frame, wait about 30 minutes for
the sealant to dry.
–
Tighten retaining frame bolts in the sequence -1 ... 18-
evenly, initially only hand-tight.
•
The retaining frame should make contact with the cylinder
head over the full surface.
–
Tighten retaining frame bolts to final torque in the se-
quence -1 ... 18-.
–
Detach bracket -T40095- and tensioner -T40096-.
Remaining installation steps are carried out in reverse se-
quence; note the following:
Note
After installing camshafts, wait for approx. 30 minutes be-
♦
fore starting engine. 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 by hand to ensure that none of the
valves make contact when the starter is operated.
–
Install cylinder head cover (left and right)
Cylinder head (left-side):
–
Renew camshaft oil seal
–
Install toothed belt for high-pressure pump
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
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120.
107.
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48.
Audi Q7 2007 !
2 Servicing valve gear
6
127