Attention: Exhaust valve seats have additional constriction. When machining seats, care must be taken not to damage the radius of this constriction.
Calculation of the maximum allowable processing size.
Insert the valve and press it against the seat.
Measure distance -a- between end of valve stem and upper edge of cylinder head.
In order to maintain the maximum allowable processing dimension, the maximum dimension must be subtracted from the measuring distance -a-, i.e.
- ...mm = measured distance -a-
- -..mm = minimum dimension
- ...mm = max. allowable processing size
Gasoline inlet valve seat
Gasoline exhaust valve seat
For valve seat geometry, see chapter "Repair characteristics".
Valve dimensions see chapter "Repair characteristics".
Exhaust valves are sodium filled and can no longer be crushed. Divide the valve in the center of the stem with a hacksaw into two parts. The valve must not be exposed to water. Then throw the parts of the valve into a bucket of water and move away.
Attention: As it enters the water, a chemical reaction occurs in which sodium ignites.
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