Did you see the engine temperature light appear on your car’s dashboard? Have you needed to add coolant multiple times over a couple of weeks?
These problems could mean that something is wrong with the cooling system.
A vehicle’s cooling system keeps the engine running at a safe operating temperature. It’s made up of several parts: radiator hoses, thermostat, water pump, heater hoses, radiator and heater core.
Overtime, the components can fail, which impacts the system’s ability to do its job – preventing the car from overheating.
In this article, we will focus on the water pump and some indicators that it’s going bad.
What does the water pump do?
Before talking about signs of a bad water pump, we’re going to take a step back and explain the role this part plays.
Once the engine hits a specific temperature, it prompts the thermostat to open.
Coolant is circulated through the cooling system by the water pump. This component sends the fluid into the radiator and then the coolant moves onto the heater core and engine block.
The amount of coolant that flows into the radiator is determined by how open the thermostat is.
What can cause the pump to go bad?
Different issues can cause water pumps to malfunction.
Bad water pumps may be the result of a worn bearing. If a bearing moves back and forth, it’s not a full seal. The bearing may also ride near the seal. If it’s moving, it will hit the seal, creating a tear.
Coolant leaks are another possibility. They can develop if a gasket or seal fails. On rare occasions, a crack will be found. Some of the European vehicles have a plastic secondary water pump.
If a driver only has water in the cooling system, it could freeze during the wintertime, causing the engine block, water pump and other parts to crack.
A lack of maintenance also impacts the water pump. Coolant that isn’t regularly replaced through a coolant fluid exchange will become acidic and start eating away at items.
Possible signs that you have a bad water pump
Because the water pump can be hidden by other components, you may not be able to just pop the hood and check on its condition.
So, how do you know if you have a bad water pump?
Generally you find out that it’s leaking. The engine temperature light may turn on, telling you that the engine is overheating or the system is low on coolant.
You might also see coolant leaking from the front of the vehicle (normally in the center). A squeaking or a chirping noise could be heard, too.
You may not experience any water pump or cooling system problems when using your vehicle. Sometimes, issues might not be discovered until a car is brought in for routine maintenance.
Maybe the technician sees the coolant is low or the PH is incorrect during their courtesy check. Coolant color and residue around pumps, hoses and seals are other items we keep an eye out for.
When you bring your vehicle in for an oil change or another service, see if the shop offers digital inspections. This handy tool gives drivers a detailed update on how their car is doing.
Steve’s Auto Repair & Tire is an authorized Goodyear tire dealer located near Manassas, Virginia. Automotive repair services are performed on all makes and models, including BMW and Mercedes. Services include oil changes, brakes, alignments, inspections, and computer engine diagnostics.









