The engine oil pump is one of the most important components of the lubrication system, because without adequate oil pressure, the engine suffers fast wear and tear and can seize up.
In this article, learn how it works, what the symptoms of failure are, and when to replace this component to prevent serious and costly damage.
What Is The Engine Oil Pump?
The engine oil pump is the component responsible for circulating lubricating oil throughout the engine.
Without this element, the oil does not reach critical areas of the engine.
What Does An Engine Oil Pump Do?
The main function of the engine oil pump is to ensure constant oil pressure to:
- Lubricate moving parts, such as the crankshaft and camshaft;
- Reduce friction between metal components;
- Dissipate heat generated by combustion;
- Help remove impurities and residues.
A failure in the function of this component quickly compromises the engine’s service life.
Where Is The Oil Pump Located?
As a general rule, this component is located at the bottom of the engine, near the crankcase.
In some models, it is integrated into the front of the engine or attached to the crankshaft.
How Does The Engine Oil Pump Work?
The oil pump works mechanically or electrically, depending on the type.
In most engines, it is driven directly by the engine, via the crankshaft or the timming chain.
The operating process is simple: the pump draws oil from the crankcase, pressurizes it, and sends it through the engine’s internal channels.
Then, a regulating valve controls the pressure to prevent excess pressure from damaging the system.
What Are The Main Types Of Oil Pumps?
There are several types of pumps, the most common being:
1. Gear Pump
This is the most common model. It uses two gears to create pressure and ensure a constant flow of oil.
2. Trochoidal Pump
More compact and efficient, it is common in modern engines as it offers better pressure control.
3. Vane Pump
Less common but effective, it uses moving vanes to suck and propel the oil.
4. Electric Oil Pump
Found in some modern and hybrid engines, it works independently of the engine type.
What Are The Symptoms That Indicate A Lack Of Oil Pressure In The Engine?
Low oil pressure is a critical sign that usually manifests itself as:
- Dashboard light;
- Metallic noises in the engine;
- Increased engine temperature;
- Irregular operation or loss of power.
Can I Drive My Car With A Faulty Oil Pump?
No. Driving with a faulty oil pump is extremely dangerous, even for a few minutes, as it can cause severe damage to the engine.
If the oil light comes on, you should turn off the engine immediately to avoid further damage.
Does The Oil Pump Affect Fuel Consumption?
Yes, indirectly, because a faulty engine oil pump increases internal engine friction, reduces efficiency, and can lead to higher fuel consumption.
Therefore, whenever you detect any signs of malfunction, it is essential to replace it as soon as possible.
How Long Does An Engine Oil Pump Last?
This component can last for the entire life of the engine, provided that the car is properly maintained.
Dirty or unsuitable oil accelerates engine wear, so it is essential to change the oil and filter regularly to ensure the engine runs smoothly.
How Often Should An Oil Pump Be Replaced?
This component does not have a fixed replacement interval, however, it is usually replaced when it malfunctions or during a major engine repair.
It makes sense to replace the engine oil pump preventively in cases of high wear, when the actual mileage is very high, or when there is a serious lubrication malfunction.
What Tool Is Available In The Kroftools Catalog For Aligning The Engine Oil Pump?
To correctly replace this component, you will find our oil pump and shaft alignment kit for BMW in the KROFtools catalog.
Balance Shaft & Oil Pump Alignment Kit BMW 1.6 / 2.0 P
This kit consists of:
- 1 balancer shaft locking tool;
- 1 tensioner retaining pin;
- 1 sprocket locking tool.
Click on the image for more information about the Balance Shaft & Oil Pump Alignment Kit BMW 1.6 / 2.0 P (ref.1636)
How Much Does It Cost To Replace An Oil Pump?
The price of an engine oil pump varies depending on several factors, such as the type of pump, the manufacturer, and the model of the vehicle or equipment.
As a general rule, the price can range from a few dozen to several hundred euros.
It is also important to note that, in many cases, replacing the pump requires the disassembly of engine components, which can increase the total cost of the repair.
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