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Valve Guides, Checking Audi A8 D3 рестайлинг 2

6.0l 12-cyl. 4v Engine Mechanical, Engine Code(s): Bsb 1 illustration ~118 words

Valve Guides, Checking

Special tools, testers and auxiliary items required

  1. Dial gauge holder VW 387
  1. Dial gauge VAS 6079

Work sequence

Scheme 665

Scheme 665
Scheme 665
  1. Insert valve into valve guide.
  1. Valve stem tip must seal with valve guide.

Note. Due to differences in valve stem diameter, make sure that only intake valves are used to check intake valve guides, and only exhaust valves are used to check exhaust valve guides.

  1. Determine tilt clearance.
  1. Tilt clearance wear limit: 0.8 mm.

Note. If wear limit is exceeded, re-measure using new valves. If wear limit is still exceeded, replace cylinder head. The valve guides cannot be replaced. If a valve is replaced during repair, use the new valve for measurement.