Checking/Refacing Cylinder Head Contact Surface

NOTE: Face cylinder head mating surface only when porous or damaged, or if an impermissible deviation of the evenness has been measured in longitudinal direction.

Facing
For specifications, Specifications

1 Measure reference value H and note down.
2 Face cylinder head mating surface. Remove sharp edges around combustion chamber.
3 Again measure dimension H. Determine material removed and note down.
4 Insert valve and measure distance between valve stem end and cylinder head, note down.
5 Remachine valve seats according to the material removed from the cylinder head. Service and Repair
6 Check valve (camshaft) timing. [1][2]Procedures