Engine Overhaul Manual v8 4.0 4.6
ENGINE
10
OVERHAUL
3. Using LRT-12-039A partially press guide into
cylinder head, remove tool.
4. Fit LRT-12-208 over valve guide and continue
to press guide into cylinder head until tool
LRT-12-039A contacts tool LRT-12-208;
remove tools.
5. Check valve guide installed height A = 15.0
mm (0.590 in)
6. Using piloted reamers, ream valve guides from
valve spring side of head in 2 stages, with the
final cut being 0.1 mm (0.004 in), to give a
finished internal diameter of 8.70 mm (0.34 in).
7. Remove all traces of swarf on completion.
Valve seat inserts - inspection
1. Check valve seat inserts for pitting, burning
and wear. Replace inserts as necessary.