Oil Pump Inspection - Honda EP3 Service Manual

Engine Lubrication
Oil Pump Overhaul {cont'dl
Oil Pump Inspection
1 . R e m o v e t h e p u m p h o u s i n g .
Check the inner-to-outer rotor radial clearance
between the inner rotor (A) and outer rotor {B). lf
the inner-to-outer rotor radial clearance exceeds
the service limit, replace the oil pump.
Inner Rotor-to-Outer Botor Radial Clearance
Standard {New): 0.02 0.16 mm (0.001 -0.006 in.)
Service Limit:
0.20 mm (0.008 in.,
1'[1e-\1.-,-2
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3. Check th e h ousing-to-roto r axia I clearance between
t h e r o t o r ( A ) a n d p u m p h o u s i n g ( B ) . l f t h e h o u s i n g -
to-rotor axial clearance exceeds the service limit.
r e p l a c e t h e o i l p u m p .
Housing"to-Rotor Axial Clearance
Standard (New): 0.02 0.07 mm (0.001 -0.003 in.l
Service Limit:
0.12 mm (0.005 in.l
Check the housing-to-outer rotor radial clearance
between the outer rotor (A) and pump housing (B).
lf the housing-to-outer rotor radial clearance
exceeds the service limit, replace the oil pump.
Housing-to-Outer Rotor Radial Clearance
Standard lNewl: 0.15 0.21 mm (0.006-0.008 in.l
Service Limit;
0.23 mm (0.009 in.)
Inspect both rotors and the pump housing for
scoring or other damage. Replace parts if
necessary.
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