Measuring Radial Clearance - Audi Q7 2007 Workshop Manual

更多资料请访问深度汽车论坛 http://shenduauto.com/ 客服QQ：1398556747 电话：18218750259
Dial gauge -VAS 6079-
♦
Procedure
–
Bolt dial gauge with dial gauge bracket -VW 387- onto cyl-
inder block and apply gauge against crank web.
–
Push crankshaft against dial gauge by hand and set gauge
to "0".
–
Push crankshaft away from dial gauge and read off value.
Axial clearance:
•
New: 0.090 ... 0.215 mm.
•
Wear limit: 0.280 mm.
3.4

Measuring radial clearance

Special tools and workshop equipment required
Plastigage
♦
Procedure
Note
Do not interchange used bearings.
♦
Bearing shells worn down to nickel layer must be renewed.
♦
–
Remove retaining frame and clean bearing journals.
–
Place a length of Plastigage corresponding to the width of
the bearing on the bearing journal or bearing shell.
•
The Plastigage must be positioned in the centre of the
bearing shell
–
Fit retaining frame and tighten to 30 Nm. Do not rotate
crankshaft.
–
Remove retaining frame once more.
–
Compare width of Plastigage with measurement scale:
Radial clearance:
•
New: 0.018 ... 0.045 mm.
•
Wear limit: 0.10 mm.
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
Audi Q7 2007 !
3 Removing and installing crankshaft
6
95