Audi Q7 2007
!
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
Repair Group 13 – Crankshaft group
6
96
4
Dismantling and assembling pistons and conrods
4.1
Pistons and conrods - exploded view of components
Oil spray jet for piston cooling
⇒
Fig. on page 97
.
1 - Conrod bolts,
30 Nm + 90
°
(
1
/
4
turn)
further
"
Renew
"
Lubricate threads
and contact surface
"
To measure radial
clearance, tighten
to 30 Nm but do not
turn further
2 - Conrod bearing cap
"
Do not interchange
"
Mark cylinder allo-
cation with a col-
oured pen -B-
⇒
Fig. on page 98
"
Installation position:
Note position of
lugs on casting -A-
3 - Bearing shells
"
Note installation po-
sition
"
Do not interchange
used bearing shells
(mark positions)
"
Bearing shells worn
down to nickel layer
must be renewed
"
Measuring radial
clearance
⇒
page 100
"
To measure radial
clearance, tighten
bolts
⇒
item 1
to
30 Nm but not further
4 - Conrod
"
Only renew as a complete set
"
Mark cylinder allocation with a coloured pen -B-
⇒
Fig. on page 98
"
Installation position: Note position of lugs on casting -A-
"
Axial clearance for each conrod pair (when new): 0.20 … 0.44 mm
5 - Circlip
6 - Piston pin
"
If difficult to move, heat piston to approx. 60
°
C
"
Remove and install using drift -VW 222 A-
7 - Piston
"
With combustion chamber
"
Mark installation position and cylinder number
⇒
Fig. on page 98
Note
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