Cylinder block
7-43
Removing the oil filter
1. Remove:
• Oil fil
ter “1”
Checking the cylinder block anode
1. Check:
• Anode
Eroded (1/2 or more) Replace.
There is grease, oil, or scales Clean.
Do not apply grease, oil, or paint to the an-
ode.
Checking the oil pump
1. Check:
• Inner surface of the
oil pump housing
Scratched Replace the
oil pump as-
sembly.
2. Check:
• Gear
teeth of the inner rotor and outer ro-
tor
Cracked/worn Replace the
oil pump as-
sembly.
3. Measure:
• Inner
rotor to outer rotor tip clearance “a”,
outer rotor to oil pump housing clearance
“b”, and oil pump housing to inner rotor
and outer rotor clearance “c”
Out of specification Replace the
oil
pump assembly.
Assembling the oil pump
1. Install:
• Oil seal
“1” (into the oil pump hous-
ing “2”)
Install an oil seal halfway into the oil pump
housing, and then install the other oil seal.
Oil filter wrench “2”
90890-01426
1
2
1. Inner rotor
2. Outer rotor
3. Oil pump housing
Inner rotor to outer rotor tip clear-
ance
0.12 mm (0.0047 in)
Limit
0.16 mm (0.0063 in)
Outer rotor to oil pump housing
clearance
0.1 mm (0.0040 in)
Limit
0.20 mm (0.0079 in)
Oil pump housing to inner rotor and
outer rotor clearance
0.03 mm (0.0012 in)
Limit
0.12 mm (0.0047 in)
b
a
123
3
c
A-A
AA
1
2
3
4
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