Range Rover (LP) V8-4.0L (1999)
Valve: Service and Repair
Lapping Valves
Lapping Valves
1. Lap each valve to its seat using fine grinding paste.
2. Clean valve and seat.
3. Coat valve seat with a small quantity of engineer's blue, insert valve and press it into position several times without rotating. Remove valve and
check for even and central seating. Seating position shown by engineer's blue should be in center of valve face.
4. Check valve installed height if valve seats have been recut or new valves or valve seat inserts have been installed.
Valve installed height A: 47.63 mm
5. Thoroughly clean cylinder head, blow out oilways and coolant passages.