User Manual

3. Check the front camshaft bearing for wear. Refer
to Specifications, “Camshaft Bearings” for the
correct specification of the camshaft bearing. If a
new bearing is needed, use a suitable adapter to
press the bearing out of the bore. Ensure that the
oil hole in the new bearing faces the front of the
block. The oil hole in the bearing must be aligned
with the oil hole in the cylinder block. The bearing
must be aligned with the face of the recess.
i04338889
Cylinder Head - Inspect
1. Remove the cylinder head from the engine.
2. Remove the water temperature regulator housing.
3. Inspect the cylinder head for signs of gas or
coolant leakage.
4. Remove the valve springs and valves.
5. Clean the bottom face of the cylinder head
thoroughly. Clean the coolant passages and the
lubricating oil passages. Make sure that the
contact surfaces of the cylinder head and the
cylinder block are clean, smooth, and flat.
6. Inspect the bottom face of the cylinder head for
pitting, corrosion, and cracks. Inspect the area
around the valve seat inserts and the holes for the
fuel injection nozzles carefully.
7. Test the cylinder head for leaks at a pressure of
200 kPa (29 psi).
Illustration 69 g02490336
Flatness of the cylinder head (typical example)
(A) Side to side
(B) End to end
(C) Diagonal
8. Measure the cylinder head for flatness. Use a
straight edge and a feeler gauge to check the
cylinder head for flatness.
• Measure the cylinder head from one side to the
opposite side (A).
• Measure the cylinder head from one end to the
opposite end (B).
• Measure the cylinder head from one corner to
the opposite corner (C).
Refer to Specifications, “Cylinder Head” for more
information.
i04156372
Piston Height - Inspect
Table 10
Required Tools
Tool
Part
Number
Part Description Qty
A
21825617
Dial Gauge 1
B
21825496
Dial gauge holder 1
UENR0623-02 81
Basic Engine
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