Audi Q7 2007 Workshop Manual

Audi Q7 2007 !
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
Repair Group 13 – Crankshaft group
6
100
Procedure
– Set up dial gauge -VAS 6079- with -VW 382/7- and
-VW 385/17-.
– Measure piston projection at two points -1- for each pis-
ton.
Cylinder head gasket identification
1- Holes
2- Part No.
The gaskets for the left and right cylinder heads have different
shapes and cannot be interchanged.
4.3 Piston and cylinder dimensions
4.4 Checking radial clearance of conrod bear-
ings
Special tools and workshop equipment required
♦ Plastigage
Procedure
– Remove conrod bearing cap. Clean bearing cap and bearing
journal.
– Place a length of Plastigage corresponding to the width of
the bearing on the bearing journal or bearing shell.
– Fit conrod bearing cap and tighten to 30 Nm. Do not rotate
crankshaft.
– Remove conrod bearing cap once more.
– Compare width of Plastigage with measurement scale:
Piston projection above top
surface of cylinder block
Identification
(No. of holes)
0.39 … 0.49 mm 1
0.49 … 0.54 mm 2
0.54 … 0.65 mm 3
Honing dimension
(in mm)
Piston ∅ Cylinder bore ∅
Basic dimension 82.939 … 82.951
1)
83.006 … 83.014
Repair oversize 82.979 … 82.991
1)
83.046 … 83.054
•
1)
Dimensions not including graphite coating (thickness
0.02 mm). The graphite coating will wear down in serv-
ice.
Note
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Audi Q7 2007 Specifications

General

Brand	Audi
Model	Q7 2007
Category	Automobile
Language	English