10-15
Chapter 10 COOLING SYSTEM
2.6 Water Pump - Inspect
Measure the inside diameter of water pump case fit to bearing, and the outside diameter of shaft fit to bearing, and the inside
and outside diameters of bearing. If any of the measurements is out of the standard, replace the part with a new one.
　
2.7 Water Pump Shaft - Inspect
When the flange and impeller are removed from water pump shaft, interference may become deficient.
If the interference is less than the specified standard value, replace either impeller or water pump shaft.
Item Nominal value Standard value Limit value
Inside diameter of pump case fit to bearing
ø80 mm
[3.15 in.]
79.988 to 80.018 mm
[3.1491 to 3.1502 in.]
80.025 mm
[3.1506 in.]
ø90 mm
[3.54 in.]
89.987 to 90.022 mm
[3.5428 to 3.5442 in.]
90.025 mm
[3.5443 in.]
Bearing
outside diameter
ø80 mm
[3.15 in.]
79.985 to 80.000 mm
[3.149 to 3.1496 in.]
-
ø90 mm
[3.54 in.]
89.985 to 90.000 mm
[3.5427 to 3.5433 in.]
-
Inside diameter
ø40 mm
[1.57 in.]
39.988 to 40.000 mm
[1.5743 to 1.5748 in.]
-
Outside diameter of shaft fit to bearing
ø40 mm
[1.57 in.]
40.002 to 40.013 mm
[1.5748 to 1.5753 in.]
39.995 mm
[1.5746 in.]
Impeller front clearance
0.72 mm
[0.0311 in.]
0.14 to 1.30 mm
[0.006 to 0.0512 in.]
-
Item Nominal value Standard value
Interference between impeller and water pump shaft
ø20 mm
[0.79 in.]
0.024 to 0.060 mm
[0.0009 to 0.0024 in.]
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