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Oil Pump

Lubricating Oil Pump

Engine Oil Pressure Sensor
The engine oil pump in your engine is used to pressurize oil, the lubricating oil within the motor. The engine oil pump generates the oil pressure, and the oil pressure sensor is used to monitor the performance of the engine oil pump. Engine oil pressure is critical for safe and prolonged engine operation. heat removal and proper lubrication of all internal engine parts.  The primary duty of your engine oil is the lubrication of the engine's internal surfaces, The engine oil is the lubricant used to prevent friction generated from the engines internal parts coming into contact with each other.

As your lubricating oil is pressurized by the oil pump, it passes by the engine oil pressure sensor or oil pressure sender. The engine oil pressure sender monitors the pressure levels to make sure they stay within the engine manufactures the operating range. When the oil pressure goes outside of the manufacturer's recommended limits, a signal to the oil pressure gauge or oil pressure warning light on the dashboard will alert the driver that there is a problem.

What can an oil pressure sensor or sending unit do to an engine?

The oil pressure sensor will send the reading to the oil pressure gauge. In some vehicles, this sensor will also send a reading to the ECU that will shut down the engine or cause a No Start condition. These are an act of self-preservation for your motor so as not to damage the motor in a situation where you have low pressure. As low oil pressure may signify a weak oil pump, a really low oil level or a related fault which will damage the engine if not treated. However, the oil pressure sensors can go bad and send a faulty reading. If you are having problems with the cold engine starts it could be the oil pressure sensor. The engine will not be able to start if the oil pressure sensor has failed.

We at KLM Performance strongly recommend addressing issues relating to low oil pressure immediately. Any problems relating to low oil pressure must be addressed without delay. Never continue to drive when your vehicle with low oil pressure. Any engine that is running with low or no oil pressure will seize the motor.

How To Determine if You Have a Faulty Engine Oil Pressure Sensor?
The engine oil pressure sensor is used to measure the engine’s oil pressure. It is necessary because if the engine is run with little or no oil pressure, the moving parts


The oil pump in an internal combustion engine circulates engine oil under pressure to the rotating bearings, the sliding pistons, and the camshaft of the engine.
This lubricates the bearings, allows the use of higher-capacity fluid bearings, and also assists in cooling the engine.


What are the warning signs of a problem with my Oil Pump? 

Proper maintenance and care are necessary to keep this vital engine part performing smoothly. The oil pump will provide warning signs that it is starting to malfunction. These are the warning signs you should be aware of.

  • Increased Engine Noise - Clanking Noise. Any Noise coming from underneath the hood needs to be addressed in short order. , particularly if there is a clanking noise, are signs of trouble. A primary duty of oil is to lubricate the engine and prevent friction resulting from parts coming in contact with each other. The clanking noise is a warning that there is an insufficient lubricant that could be caused by a defective oil pump. The hydraulic lifters are ordinarily not noisy at all. Commotion coming from them is an indication that not enough oil is being pumped to them.
  • The illumination of the Check Engine light on your dashboard.
  • Engine temperatures are rising.


The engine of an automobile relies on many parts functioning properly. It should be no surprise that if one becomes deficient; it is going to cause a great deal of wear on the engine itself. The oil pump is something that is often taken for granted and should not be. Proper maintenance and care are necessary to keep this engine part performing smoothly. The oil pump is going to provide warning signs that it is starting to malfunction.

Sign of trouble: Clanking Noise
Never ignore the Check Engine light of the car. It will alert the driver to problems that are occurring in the engine, which may be the oil pump itself. An auto mechanic should be consulted as soon as possible to have the problem fixed. At the same time, some additional information should be given to the mechanic, so he or she can go straight to potential problem areas. Noise coming from underneath the hood, particularly if there is a clanking noise, are signs of trouble. A primary duty of oil is to lubricate the engine and prevent friction resulting from parts coming in contact with each other. The clanking noise is a warning that there is an insufficient lubricant that could be caused by a defective oil pump. The hydraulic lifters are ordinarily not noisy at all. Commotion coming from them is an indication that not enough oil is being pumped to them.

Impact of low oil pressure:

The oil pump is responsible for generating the kind of pressure that allows oil to circulate all through the engine. Low oil pressure is not a good sign and is often detected by the car not starting up. If a look on the dashboard indicates that the engine temperature is racing up, the oil pressure is insufficient and friction is starting to develop within the engine. These are all indicators of some oil trouble under the hood.

Oil Pump Importance 

The Oil Pump is the Heart of the Lubricating Oil system in your engine.  is the ‘lifeblood’ of an engine, without which it would rapidly stop working. Lube Filters remove impurities and the wear-causing contaminants from the engine’s oil, rather like kidneys purify the blood. If the Lube Filters are not doing an effective job, engine life can be radically shortened. Lube Oil not only allows the internal components of an engine to move by keeping the various parts separate from each other, but it also carries out a number of other very important tasks:

  • Removing Heat
  • Forming a seal between the cylinder wall and the piston rings
  • Cleaning internal surfaces
  • Transporting debris to the Filter
  • Contamination through Combustion


It may appear that this is a ‘closed-loop’ system, where a fixed quantity of Oil is pumped around the same circuit and should be relatively easy to keep clean. However, the combustion process, where the fuel and air mixture is burned to generate power, creates a break in this loop. Combustion inevitably generates a number of contaminants that pollute the Oil.

Cause of low oil pressure:

It is possible that the oil pump may not always be the culprit. Leaks can happen that are not related to the oil pump at all. Low oil pressure may be caused by something as simple as using the wrong brand of motor oil. In fact, other things can influence oil pressure including engine bearings that have become worn out. An oil pressure check by a professional can discover whether or not the oil pump is having difficulty. The car owner has to understand there are consequences for not responding to possible oil pump problems. The hydraulic lifters are necessary auto parts and don’t come cheap. Not enough lubrication will eventually wear them done and be the reason for some fairly expensive repair work. The engine itself will be damaged if there is insufficient lubrication.


Here are 3 bad oil pump symptoms that, at first, may not sound too worrisome to you. Knowing about common signs of a bad oil pump will help you detect the issues before it is out of your control.

Decrease In Oil Pressure
oil pump failure symptoms
Oil pressure depends greatly on the oil pump
Since the oil pump is responsible for maintaining the right oil pressure, if any abnormality arises, it will be evident. The pump pressure pushes the oil into the engine and then keeps it moving through the engine. Now, when the oil does not move along with the right pressure, the friction between the parts increases. So, if you feel that the engine is heavy, the power is low, and the car stalls frequently, it is because of decreased oil pressure. And, that is surely one of the symptoms of a bad oil pump.

So, it is not just the pump that the constant movement is damaging, but also the engine and the entire vehicle.



Increased Engine Operating Temperature
Now, we learned something important in the previous point. The pump maintains the oil pressure to a point as can impart proper lubrication for the functioning of the engine and other machinery without friction.

In the absence of that right pressure, friction will be caused for sure, and the most obvious result then, is heat generation. It is one of the most obvious oil pump failure symptoms. So, as you operate the vehicle, the temperature of the engine will rise beyond normal. And, when this happens, the heat light on your dashboard will light up to alert you about this abnormal rise in engine operating temperature.

symptoms of bad oil pump
Engine Operating Temperature might be the problem
This, if left unchecked can lead to colossal damage to the engine as well as other parts, along with a likely breakdown of the car on road (in grave situations). Addressing this issue in time is one of the important ways to save money on car repairs.

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Now, even if you go only by common sense and no mechanical knowledge of any vehicle, friction between parts can still seem an understandable problem. It causes them to rub together and cause bad oil pump sound, just like rustling pines.

Now, if we talk mechanically, a dysfunctional (or a semi-functional) pump can cause the hydraulic lifters to make noise. It leaves them rubbing against other parts without lubrication. These lifters are a vital part of the valve-train mechanism of the vehicle. Low pressure of the oil coming from the pump prevents the oil from reaching the hydraulic lifters. This causes so much friction as produces noise, loud enough to be heard clearly as the vehicle rolls. They also start to wear. Ultimately, irregularities appear if you leave it unchecked. Then, it’s high time you contemplated oil pump replacement to avoid unexpected damage to your car

FAQs:
What Is The Function Of The Oil Pump?
The oil pump is a part in internal combustion engine working to circulate engine oil under pressure to the camshaft of the engine, the sliding pistons and the rotating bearings and. This lubricates the bearings, assists in cooling the engine, and also enables the use of higher-capability fluid bearings.

How Much Does It Cost To Replace An Oil Pump?
The average cost to replace an oil pump is about $500 to $1500 but can vary vehicle or engine.

We hope that the above information will help you know clearly about what happens when an oil pump fails. If you have any questions related to symptoms of a bad oil pump, feel free to leave it in the comment section, and we will answer you later. And keep following us to get more useful maintenance tips updated every day by our experts.

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