Measuring Radial Clearance - Audi A8 2003 Workshop Manual

Audi A8 2003 ➤
8-cylinder TDI engine (4.2 ltr. 4-valve common rail), mechanics - Edition 12.2013
♦ Universal dial gauge bracket - VW 387-
♦ Dial gauge - VAS 6079-
Procedure
– Bolt dial gauge - VAS 6079- with universal dial gauge bracket
- VW 387- onto cylinder block and set it against crank web.
– Press crankshaft against dial gauge by hand and set gauge to
"0".
– Push crankshaft away from dial gauge and read off value.
Axial clearance:
• Specification: 0.10 ... 0.24 mm.
• Wear limit: 0.28 mm.
4.6

Measuring radial clearance

Special tools and workshop equipment required
♦ Plastigage
Procedure
Note
Renew used bearing shells.
– Remove retaining frame and clean bearing journals.
– Place Plastigage onto bearing journal or into bearing shells
(length of Plastigage should correspond to width of bearing).
• The Plastigage must be positioned in the centre of the bearing
shell
– Fit retaining frame and secure with old bolts
rotating crankshaft.
– Remove retaining frame once more.
96
Rep. gr.13 - Crankshaft group
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