How to Clean Scale Inside the Engine?

[LaAthena]

After the engine is turned off, drain the coolant completely and add a cleaning agent; start the engine and let it run at medium speed for 5-10 minutes, then let it sit for 15 minutes; run the engine again at medium speed for 5 minutes and drain the cleaning agent. Repeat this process three to four times until the discharged cleaning agent is free of contaminants. Below are the relevant details: 1. There are two commonly used cleaning agents for removing scale: (1) Add 750g of caustic soda and 250g of kerosene to 5000g of water. (2) Add 1000g of baking soda and 500g of kerosene to 5000g of water. The amount of cleaning agent should be determined based on the volume of coolant. 2. Scale-induced high coolant temperature will also cause the cylinder and intake manifold temperature to rise, leading to the expansion of the air-fuel mixture entering the cylinder, reducing air intake, lowering engine power, increasing fuel consumption, and potentially causing "auto-ignition" or "knocking" phenomena. 3. Excessive sediment, scale, and rust in the cooling system will reduce the coolant capacity, clog cooling system pipes, obstruct water flow, and in severe cases, cause radiator core tubes to crack and leak.

[AugustLynn]

Cleaning engine scale deposits is something I've done several times, and it's not difficult to do it yourself. The key is using a dedicated cooling system cleaner, such as the acidic cleaning solutions available on the market. First, turn off the engine and let it cool, then open the radiator cap and pour in the cleaner. Let the engine idle for about half an hour to allow the mixture to circulate and dissolve the scale. Next, completely drain the old fluid and flush the system with clean water two or three times to ensure no residue remains. Finally, refill with new coolant to the recommended level.

Scale buildup usually occurs due to hard water or insufficient maintenance. Regularly replacing the coolant every two years can prevent this issue. If left untreated, scale deposits can block the cooling passages, leading to engine overheating or even damage, so it's important to address it early. When doing it yourself, wear gloves to protect against burns, and simple tools like a wrench are sufficient.

[SanRachel]

Cleaning engine scale seems quite simple from the many DIY videos I've watched. The method involves first adding a water-based cleaner or household white vinegar, then idling the engine for 15 minutes to dissolve the scale. After shutting down, drain the liquid and flush multiple times. Key areas to check are the radiator and pipes for any buildup, with regular coolant changes to prevent issues. Scale reduces cooling efficiency, increases fuel consumption, and affects performance, so early treatment saves money and ensures peace of mind. Though the process is quick, safety comes first—never touch coolant when the engine is hot. Always monitor the temperature gauge while driving and investigate any abnormalities.

[Dale]

As a car enthusiast, I recommend being cautious when cleaning scale deposits. Use a professional cleaner in the cooling system, let the engine idle to dissolve the deposits, then thoroughly flush and replace the coolant. Unremoved scale can lead to poor heat dissipation, engine overheating, and even the risk of cracking. It must be addressed promptly. Beginners are advised to seek help from repair shops to avoid mistakes.

[DiMiguel]

Engine scale cleaning is similar to descaling a household kettle. I use professional cleaning agents, adding them to the cooling system and letting the engine idle to circulate the liquid and dissolve mineral deposits. After shutting down, drain the old fluid, flush the system, and refill with new coolant. This improves cooling efficiency and extends engine life. Preventive maintenance every two years is recommended. Scale often forms due to hard water, so regular checks for color changes are crucial.

[StAnthony]

Recalling my past experiences with cleaning scale deposits, I often used affordable yet effective cleaners. I would add them to the cooling system and let the engine idle until the scale dissolved, then drain and flush. The key is thorough flushing to avoid leaving residues that could cause corrosion. Scale buildup can result from impurities in old coolant or hard water deposits, and excessive accumulation affects heat dissipation. Regularly replacing the coolant every two years is a simple and worry-free way to prevent such issues.