V8 Engine 3.5 3.9 4.2
ENGINE
10
OVERHAUL
Valve guides - renew
1. Using valve guide remover, LRT-12-037 press
valve guide out into combustion face side of
cylinder head.
NOTE: Service valve guides are 0.025mm
(0.001 in) oversize on outside diameter to
ensure interference fit.
2. Lubricate new valve guide with engine oil and
with tapered portion of guide leading, place in
position on valve spring side of cylinder head.
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 tool.
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)
diameter.
7. Remove all traces of swarf on completion.
