Engine Flushing: Everything You Need to Know

Engine flush refers to cleaning or flushing out carbon build-up or sludge from the engine. In other words, it is the process of cleaning the inside of the engine thoroughly.

When the car engine is running, engine oil is circulated through other engine components to help it function smoothly.
Engine oil is meant to remain in motion, but when a car remains idle for too long, the oil particles begin to leave residue, which builds up sludge inside the engine.

Build-up sludge resists the flow of engine oil, leading to major issues, such as malfunctioning in spark plugs, valves, exhaust sensors, etc.
If overlooked for a prolonged period, it can also cause the replacement of the engine, which can be very expensive.

Also Read: Car maintenance tips during a lockdown

Engine oil flush is typically performed using a chemical composition or solution that breaks down the carbon deposit and sludge on the engine. The mechanic can generally use one of the three methods explained below for the oil motor flush based on the car engine's condition.

Method 1: Take Car for A Short Drive

Step 1: To perform the petrol or diesel engine flush, drain a small amount of oil from the engine.

Step 2: Add the engine flush additive or solution to the vehicle through the oil filler port.

Step 3: After that, take the car for a short drive so that the solution can reach every corner of the engine.

Step 4: The solution will help remove the sludge and carbon deposits. All the impurities will settle in the oil filter and engine oil.

Step 5: The mechanic will change the engine oil and filter.

Method 2: Idling

Step 1: In this method, drain out a small quantity of engine oil and add an engine flush additive via an oil-filler port.

Step 2: Start the engine and let it idle for 5 to 10 minutes.

Step 3: The engine oil additive will circulate throughout the engine component, and carbon build-up loosens.

Step 4: All the impurities will get deposited in the oil filter.

Step 5: Once the impurities are deposited, the mechanics change the engine oil and filter.

Method 3: Drain Out Engine Oil and Flush**

Step 1: During this engine oil flush process, drain out the engine oil.

Step 2: Add the fresh engine oil and flush additive through the oil filler port.

Step 3: Once done, start the engine oil and let it be idle for 5 to 10 minutes.

Step 4: The additive with fresh engine oil will circulate to every corner of the engine.

Step 5: The additive will clear the slump and carbon deposits and let it settle down on the oil filter.

Step 6: The car repair mechanic will change the engine oil and filter.

Also Read: How to Check Car’s Engine Oil

Engine flush additives and solutions are based on the engine specification and fuel. Some of the common engine flush additives are:

Petroleum Based Engine Flush

These are the types of engine flush additives made from kerosene or other minerals. These additives are good at breaking down the sludge and carbon build-up. However, they can be harsh on the engine seals and gaskets.

Water Based Engine Flush

Those looking for an eco-friendly option generally choose a water-based engine flush. This kind of engine flush solution is very effective for water-soluble debris. However, it is incompetent at removing oil-based residues from the engine.

Synthetic Engine Flush

Synthetic engine flushes are generally considered safer options as they contain synthetic detergents rather than solvents. Compared to petroleum-based flush additives, these solutions are milder and thus reduce the risk of engine seal damage.

Flushing your car engine is an excellent way to maintain vehicle health. Some of the benefits of engine oil flush are:

Enhanced Engine Performance

One significant benefit of oil motor flush is enhanced engine performance. Engines can accumulate sludge and deposits from old oil, combustion byproducts and other contaminants.

These build-ups can clog oil passages and restrict oil flow, reducing its effectiveness in lubricating engine parts. By flushing car engine oil, vehicle owners can remove sludge and deposits that can clog engine components, improving overall engine performance.

Extended Engine Oil Life

Another benefit of engine oil flush is extended oil engine life. Using flushing oil can significantly increase the life of your engine oil by thoroughly cleaning out sludge, deposits and contaminants that accumulate over time.

When the engine is clean, the new oil can function more effectively, maintaining its viscosity and lubricating properties for longer.

Improved Fuel Economy

Deposits on fuel injectors, valves and combustion chambers can interfere with the fuel-air mixture, leading to incomplete combustion and reduced engine performance.

Flushing oil helps clean these components, promoting better fuel combustion and improved power output. Additionally, clean engine components minimise friction and wear, improving engine performance and fuel economy.

Reduced Emissions

It also helps reduce emissions by cleaning out sludge and deposits from your engine. A clean engine burns fuel more completely, releasing fewer harmful gases into the air.

It also helps your car's emission control systems work better, making your vehicle more environmentally friendly. Regular flushing oil keeps your engine running efficiently and helps reduce pollution.

Engine Overheating

Overheating is the first sign that something is wrong with the car engine. Engine oil lubricates the other engine components.

But when sludge develops, oil does not circulate, which causes friction, leading to engine overheating. If the car engine is overheating, it may be due to sludge formation.

Engine Light

When there is a problem with engine components, the engine light turns on, warning about the malfunction in the vehicle. It is a signal to take the vehicle to the repair mechanic to identify the issue and rectify it on time.

Low Fuel Efficiency

If the vehicle's fuel economy decreases over time, it is also a sign that something is wrong with the vehicle. Engine sludge or carbon deposits for extended periods can cause the engine to work harder, resulting in increased fuel consumption.

The cost of an engine flush depends on various factors, such as the condition of the car, the model of the vehicle and where you get the service done. It is best to take your vehicle to a professional mechanic who has the necessary training and experience to handle engine flushes efficiently and safely.

Further, they also have the right tools and an understanding of various engine types and their requirements. Apart from performing an engine flush, the professional can also identify other problems in the car that might have gone unnoticed.

Regular car maintenance is essential to keeping your vehicle in proper condition. However, unforeseen incidents like damage to vehicles can happen. For this reason, having four-wheeler insurance is crucial.

It offers financial protection against various unforeseen natural and man-made damages. TATA AIG offers different four-wheeler insurance plans tailored to meet your specific needs. We have third-party, own-damage and comprehensive car insurance policies.

Further, we offer various add-ons like a return-to-invoice cover, engine security, key replacement and more for enhanced vehicle protection.

With benefits like cashless repairs, you can repair your car in a network garage without paying anything. Further, existing policyholders can do car insurance renewal online from our website in just a few taps without any physical paperwork.

Engine flushing is crucial to keep your engine running smoothly. It offers numerous benefits for car engines, from improved performance and fuel efficiency to extended engine life and reduced emissions.

However, it is advisable to consult a professional mechanic to determine the appropriate use of flushing oil for your specific vehicle.

What is an oil engine cleaner?

An oil engine cleaner, often called an engine flush, is a specialised fluid designed to clean the inside of an engine. It dissolves sludge, varnish and other contaminants that accumulate over time.

How many times can you flush an engine?

An engine can typically be flushed once or twice a year, depending on the vehicle's age, usage and condition.

Is diesel engine flush safe?

Yes, diesel engine flush is generally safe when used correctly. It helps remove sludge and deposits, improving engine performance and efficiency.