Volkswagen Workshop Service and Repair Manuals > Polo Mk3 > Power unit | 4-cylinder injection engine (2-valve), mechanics | Engine cylinder head, valve gear | Repairing valve gear | Checking valve guides

Test sequence

–	Insert new valve into guide. The end of the valve stem must be flush with the guide. Due to differences in stem diameters, use only an inlet valve in inlet guide and an exhaust valve in exhaust guide.

–	Determine rock.

Wear limit:

Inlet valve guide = 1.0 mm

Exhaust valve guide = 1.3 mm

Volkswagen Workshop Service and Repair Manuals