Note: Recommended frequency: every 12,000 km or 6 months.
Caution! Replace air conditioning system hoses at a service station equipped to check and refill the system.
High temperatures in the engine compartment cause deterioration of rubber and plastic hoses. Periodic inspection should help identify cracks, loose fasteners, localized hardening and leaks.
If you notice signs of a fluid leak but cannot determine the type or exact location of the leak, place a large piece of paper or cloth underneath the vehicle when storing it. This will help you locate the leak and identify the leaking fluid by color. But keep in mind that some leaks may only appear when the engine is running.
When the vacuum hose is not sealed, air is sucked into the hose (but it doesn't come out of the hose), which makes it difficult to detect the leak. To locate a leak, you can use an old vacuum hose as a stethoscope. Place one end of the hose to your ear (do not insert into the ear), the other one - to the site of the suspected leak. A hissing sound will be clearly heard at the leak site through the hose. Since the test is performed while the engine is running, avoid contact with hot and moving parts.
Pinpointing the exact location of a fuel leak can be difficult until the leak has grown and become noticeable. Fuel begins to evaporate quickly as soon as it comes into contact with air, especially in a hot engine compartment. Small drops may disappear before you locate the leak. If you suspect the fuel leak is in the engine compartment, let the engine cool and start it with the hood open. Since metal parts shrink when cold and rubber hoses weaken during this time, any leaks will become more noticeable at this time.
The publication is taken from the website: TOYOTAMAN.ru
Cooling system leaks are usually detected by a white or rust-colored deposit in the area of the leak.
Carefully inspect the radiator and coolant hoses along their entire length. Replace hoses with cracks, breaks or signs of aging. Cracks are easier to detect if you pinch the hose. Pay special attention to the clamps securing the hoses to the cooling system components. Overtightened clamps can cause the hose to rupture or puncture, resulting in leaks in the cooling system. Inspect all hoses and their connection points. If leaks are found, replace them or the associated gaskets.
On vehicles with automatic transmission, check the condition of the transmission oil heat exchanger hoses.