TT Roadster L4-2.0L Turbo (BPY) (2008)
Valve Guide: Testing and Inspection
Valve Guides, Checking
Special tools, testers and auxiliary items required
‹› Dial gauge holder (VW 387)
‹› Dial gauge (VAS 6079)
Test sequence
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Insert valve into guide. Valve stem end must be flush with guide. Due to the slight difference in stem dimensions, ensure that only an intake valve
is used in intake guide and an exhaust valve in exhaust guide.
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Determine tip clearance.
Wear limit
‹› If wear limit is exceeded, re-measure using new valves. If wear limit is still exceeded, replace cylinder head.
‹› If the valve is to be replaced as part of a repair, use a new valve for the calculation.