Lapping of valve seats (VW Transporter T3)

With properly machined valve seat rings and new valves, lapping of the valve seats in the cylinder head is usually not required if the leak test result is positive.

Coat the valve seat in the cylinder head with valve grinding compound and insert the valve into the guide bushing.

Wet the rubber suction cup and press it onto the valve head.



Lapping the valve by turning the lapping tool.

Note: Grooving of the seating surfaces is eliminated by frequently lifting and continuing to rotate the valves during the grinding process.

After finishing the lapping process, carefully remove any remaining grinding paste.

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