Removing and installing or replacing all valves engine BMW M52, S52, M52TU, M54, M56
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(Cylinder head removed)
Preliminary work is described in section “Disassembling and assembling cylinder head.”
Replace the valve stem seals.
Remove the valve from the cylinder head.
If necessary, check the degree of wear of valve guides.
If necessary, treat the valve guide scanning.
If necessary, lap the valve seat.
2) The valve stem seal
3) the lower spring plate
4) The valve spring
5) the upper plate spring