Audi Workshop Service and Repair Manuals > A2 > Power unit | 4-cylinder direct injection engine (1.6 ltr. 4-valve), mechanics | Engine cylinder head, valve gear | Valve gear

Checking valve guides

Special tools and workshop equipment required

t	Universal dial gauge bracket -VW 387-

t	Dial gauge -VAS 6079-

Procedure

Note

t	If the valve has to be renewed as part of a repair, use a new valve for the measurement.

t	Only insert inlet valve into inlet guide and exhaust valve into exhaust guide, as the stem diameters are different.

–	Insert valve into guide.

l	End of valve stem must be flush with valve guide.

–	Measure sideways play -arrows-.

l	Wear limit: 0.8 mm.

–	If the wear limit is exceeded, repeat the measurement with new valves.

–	Renew cylinder head if wear limit is still exceeded.

Note

Valve guides cannot be renewed.

Audi Workshop Service and Repair Manuals