landrover Workshop Repair Guides

Land Rover V8 Engine Workshop Service and Repair Manuals

Valve seats and seat inserts - refacing > < Valve guides - renew
Page 40
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ENGINE

OVERHAUL

11

Valve seat inserts - inspection

1. Check valve seat inserts for pitting, burning

and wear. Replace inserts as necessary.

Valve seat inserts - renew

NOTE: Service valve seat inserts are
available 0.025 mm (0.001 in) oversize on
outside diameter to ensure interference fit.

1. Remove worn valve seats.

CAUTION: Take care not to damage
counterbore in cylinder head.

2. Heat cylinder head evenly to approximately

120

°

C (250

°

F).

WARNING: Handle hot cylinder head with
care.

3. Using a suitable mandrel, press new insert fully

into counterbore.

4. Allow cylinder head to air cool.

Valve seats and seat inserts - refacing > < Valve guides - renew