Briggs & Stratton Vanguard 430000, User Manual

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Figure 7
4. If water pump shows evidence of leaking or if
the bearings are rough, replace the water
pump.
NOTE: Most water pump and cooling system
failures result from using straight water as a
coolant. Without water pump lubricant and
corrosion inhibitors, the water pump will fail
prematurely.
Remove Water Pump
1. Drain engine coolant.
2. Disconnect radiator hoses (Figure 8).
Figure 8
3. Remove the following parts (Figure 9):
• ( A ) By-pass hose
• ( B ) Temperature gauge wire (if equipped)
• ( C ) Coolant outlet
• ( D ) Coolant inlet
• ( E ) Water pump
Figure 9
4. Clean all traces of gasket material from
mounting surfaces and inspect mounting
surfaces for damage.
Install Water Pump
1. Install water pump with new gasket (Figure
10). Torque screws to values listed in
Section 14 - Specifications.
Figure 10
2. After installing water pump, ensure that pump
rotates smoothly.
3. Install coolant inlet with new gasket (Figure
11). Torque screws to values listed in Section
14 - Engine Specifications.
4. Install thermostat and coolant outlet with new
gasket. Torque screws to values listed in
Section 14 - Engine Specifications.
5. Install bypass hose.
6. Install temperature gauge wire (if equipped).