EM0580
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ENGINE MECHANICAL
CYLINDER HEAD
EM
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41
1996 LAND CRUISER (RM451U)
(d)
Using a soft brush and solvent, thoroughly clean the cylin-
der head.
3.
INSPECT CYLINDER HEAD
(a)
Inspect for flatness.
Using a precision straight edge and thickness gauge,
measure the surfaces contacting the cylinder block and
the manifolds for warpage.
Maximum warpage:
Cylinder block side
0.15 mm (0.0059 in)
Manifold side
0.10 mm (0.0039 in)
If warpage is greater than maximum, replace the cylinder head.
(b)
Inspect for cracks.
Using a dye penetrant, check the combustion chambers,
intake ports, exhaust ports and cylinder block surface for
cracks.
If cracked, replace the cylinder head.
4.
CLEAN VALVES
(a)
Using a gasket scraper, chip off any carbon from the valve
head.
(b)
Using a wire brush, thoroughly clean the valve.
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Version 1.00 - 12/21/2010