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.