Dismantling And Assembling Pistons And Conrods; Pistons And Conrods - Exploded View Of Components - Audi Q7 2007 Workshop Manual

Audi Q7 2007 !
6
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
4

Dismantling and assembling pistons and conrods

4.1

Pistons and conrods - exploded view of components

Note
Oil spray jet for piston cooling
1 - Conrod bolts,
30 Nm + 90° ( 1 /
4
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
⇒ item 1
bolts
30 Nm but not further
4 - Conrod
" Only renew as a complete set
" Mark cylinder allocation with a coloured pen -B-
" 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
96
Repair Group 13 – Crankshaft group
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⇒ Fig. on page
turn)
to
97.
⇒ Fig. on page 98
⇒ Fig. on page 98