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How Does it Work /
Water Pump
How Does a Water Pump Work?
Introduction:
A water pump is used to circulate water throughout the
engine block,
cooling and
heater systems. The water pump is driven by the engine via
multi rib belt in most cases. When a water pump fails it can produce a
squeaking or rattling sound. Also, a water pump can
leak engine coolant through a relief port that allows coolant to pass when
the shaft seal fails. This port is created so engine coolant will not
contaminate the shaft bearings causing a worst problem. If a failing or failed
water pump is allowed to operate it can cause the engine to overheat or
completely fall apart causing cooling system or other internal engine damage.
The water pump circulates coolant continuously, a
thermostat is used to control the rate of coolant flow through the cooling
system . A water pump is comprised of a main housing body, flange, main shaft,
bearings, impeller, seals and a gasket to seal in against the block.
Water Pump (appearance will very)
When engine RPM increase so does the water pump flow rate. A water pump will
typical last between 60,000 and 100,000 miles. When replacing a water pump
always insist on high quality replacement parts to avoid premature failure. To
check your water pump condition, make sure the engine is off, next grab a hold
of water pump flange and try to move it back and forth. There should be little
to no play in the main shaft bearing. If excessive play exists the water pump
has failed and needs replacement. Some engine designs have the water pump driven
by the engine's timing belt or chain. When this style of water pump design fails
it can cause engine coolant to enter the crankcase. This situation can be bad
because the engine oil is compromised and can cause the engine to fail. The
water pump is responsible for supplying coolant to the
heater core for proper
heater operation. If the
water pump impeller is defective it can cause the
engine to overheat and poor heater performance.
Replacement Guide
Tools needed:
- Set of sockets and socket wrench with extensions
- Phillips and standard screw drivers
- Gasket scrapper
- Wrench set
- Gasket sealer (optional)
Replacement Procedure:
- Start with engine cold, drain coolant
- Remove multi rib drive belt
- Remove all accessories to access water pump mounting bolts, remove water
pump
- Using a gasket scrapper remove all of the old gasket and clean surfaces
thoroughly
- Install new water pump with sealing gasket and tighten evenly
- Reassemble as needed
- Refill cooling system with coolant and start engine, refill system as
the engine warms up
- Recheck coolant level after the engine has cooled
NOTE: Check for coolant leaks after the job is completed and repair as
needed.
Related Replacement Components:
Basic Checks
Low levels of coolant can lead to problems related to engine overheating. Always
maintain proper levels of coolant in the overflow coolant reservoir tank. ONLY!
Check the radiator when the engine is cold. Only add antifreeze and reinstall the
cap properly. Always drain and refill your
cooling system regularly.
How Does it Work
/
Water Pump
Check Manufacturer Specific Water
Pump
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