Repair Or Replacement Of Inlet And Exhaust Valves - Bukh DV36/48 Workshop Manual

Repair or replacement of inlet and exhaust valves

1. Remove the cylinder head from the engine (page C5).
2. Then place the cylinder head on a file bench or the
like with the valve seats at the bottom.
3. Compress the valve springs with a special tool or the
like and remove the conical valve locking halves.
4. Then place the cylinder head upright and remove the
valves from the cylinder head.
Refitment is a reversal of removal procedure.
Note! Refit the valves in the same valve guides again.
Replace the valves if they are so damaged that a refacing with special tools and subsequent
grinding are impossible without exceeding the tolerances indicated on page C18 and C19.
A refacing of the valve seats with fixed guide should always be made if the valve does not
function satisfactorily.
After replacement of valve or valve seat, grind together with abrasive compound seat and valve
so that total tightness is obtained. It is an indispensable condition for the compression of the
engine that this work is performed carefully.
Grinding of valves is made as described on page C18.
009W2329-R01
C15