Injector sleeves should be replaced when
repairing cylinder heads with high hours.
(10) Inspect six injector sleeves (8) for damage, corrosion,
cracks, or pitting.
(11) Measure cylinder head flatness, using a straight edge
and feeler gage. Refer to Table 20-4 Cylinder Head
Always check the thickness of a cylinder head
before resurfacing. Cylinder head may have
been previously resurfaced and may not have
enough stock to be resurfaced again.
(12 Measure the cylinder head (9) for thickness dimension
(A), and compare the dimensions to Table 20-3 (Valve
Seat Insert Specifications). A maximum stock removal
of 0.010 in. (0.025 cm) is permissible when resurfacing
the head or a minimum head thickness of 4.037 in.
Table 20-4. Cylinder Head Surface Flatness.
0.006 in. (0.015 cm)
For Any Span
0.002 in. (0.005 cm)
5.91 in. (15.01 cm)