The most common symptom of a bad water pump is a leak. Do you have a leak? The most common symptom of a bad thermostat is overheating. A bad water pump can't (except very rare circumstances) cause over heating, and a bad tstat doesn't cause a leak.
If you notice coolant leaking from your vehicle, especially if it is coming from the front or back of the engine, it's a good idea to have your water pump checked out by a mechanic. Another common symptom of a failing water pump is an overheating engine.
Since you cannot physically inspect the impeller and inside of a water pump without removing the pump, the best way to know if it is functioning properly is to visually inspect the coolant condition, test the coolant pH and protection levels, test drive the vehicle to verify normal operating temperature, and squeeze ...
Symptoms of Failure: If you are experiencing overheating or cooling issues, it might be indicative of thermostat failure, making replacement necessary. In summary, while you don't have to replace the thermostat when replacing a water pump, doing so can be beneficial for long-term reliability and efficiency.
A defective water pump cannot be repaired, it must be replaced with a new one. It is a common practice to also replace the vehicle's thermostat when doing a water pump replacement. It is not always needed, but if you suspect that your engine got hot when the water pump failed, it's a good idea to take care of it.
If your car's water pump goes out, one or more warning lights may pop up on the dash. For example, you may see the low coolant warning, overheat warning, or a check engine light.
Take your radiator cap off and note the coolant level. idle the vehicle until it's hot enough for the fans to kick on, maybe 10-15mins depending. When they do, you can look down in your radiator and see the coolant level drop and probably see it circulating as well.
P0128 is an extension of OBD-II code P0 which indicates a problem with your car's coolant thermostat.
Signs of a Bad Thermostat
If there's no change in your home's temperature when you adjust the temperature, or the display is unlit or unresponsive, your thermostat may be broken, or the batteries need replacing.
After, check if the water pump functions by the coolant rushing out after removing the radiator's blockage. If that doesn't happen, use a rag to squeeze into the upper radiator hose while someone steps on the accelerator. Then, release the radiator hose to check for coolant flow.
A whining or groaning noise usually means that either a drive belt is loose, or the water pump pulley is bad. It may surprise your customer that a pulley could fail, but it does occasionally happen. Pulleys have been known to fail due to rust, which can cause cracking between their bolt holes.
One of the common signs of bad water pump functionality is overheating. The pump may not leak coolant, but the pump mechanism itself may have failed. Over time the fins of the pump can actually wear down to the point where they are no longer moving coolant.
A water pump replacement costs between $400 and $800 depending on the vehicle and the difficulty involved. Parts can run from $200 to $400, with labor services similarly priced. These estimates do not include taxes or shop materials, and disposal fees.
Loosen the top hose clip, then ease off the hose. Partially drain the cooling system first. With a normal top-mounted thermostat you need drain only part of the cooling system .