INSPECTION AND REPAIR OF BASIC ENGINE
6-9
3.4 Measuring clearance between camshaft
journal and cylinder block bore
Calculate the clearance between the outside diameter of the
camshaft journal and inside diameter of the cylinder block
bore. Replace the camshaft or cylinder block if the
clearance exceeds the limit.
Note: Start measurement from the No.2 camshaft hole
because the No.1 camshaft hole is for ball bearings.
Measuring outside diameter of camshaft journal
Measuring inside diameter of cylinder block camshaft
holes
3.5 Measuring cam lift
Measure the minor and major axes of cam to determine cam
lobe lift. If the lift is less than the limit, replace the camshaft
with a new one.
Measuring cam height of camshaft
3.6 Measuring cam height of fuel injection
pump camshaft
Measure the cam height. Replace the camshaft if the height
is less than the limit.
Measuring cam height of fuel injection pump camshaft
Item Standard Limit
Clearance between camshaft
journal and cylinder block bore
0.050 to 0.100 mm
[0.0020 to 0.0039 in.]
0.150 mm
[0.0059 in.]
Measuring
points
Measuring
directions
Item Standard Limit
Cam height of camshaft
(major axis)
27.27 to 27.47 mm
[1.0736 to 1.0815 in.]
26.37 mm
[1.0382 in.]
Measuring
points
Measuring
directions
Item Standard Limit
Cam height of fuel injection pump
camshaft (longer diameter)
29.9 to 30.1 mm
[1.177 to 1.185 in.]
29 mm
[1.1417
in.]
Measuring
points
Measuring
directions
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