Radiator cleaning
Flush the radiator with a high pressure hose to remove dirt from its core.
Note: if the water pressure at the outlet of the hose is higher than 30-35 bar, then it is necessary to keep the spray nozzle from the radiator at a distance of 40-50 cm so as not to damage the radiator.
Radiator check
1. Remove the radiator cap.
Attention: on a hot engine, this operation must be carried out with care to avoid burns from hot water or steam.
2. Check the radiator cap using a radiator tester.
Note:
- If there are traces of liquid and / or foreign deposits on the cap, rinse and blow the cap.
- When performing the tests below, it is necessary to hold the radiator tester mounted on the radiator cap at an angle of at least 300C from the horizontal, as shown in the figure.
Evenly and slowly (1 tester piston stroke in 3 seconds or more) by moving the tester piston, pressurize the steam valve of the radiator cap and verify that the valve opens with air pressure. Otherwise, replace the radiator cap.
- Valve opening pressure:
- nominal - 0.75-7.05 bar
- minimum allowable - 0.6 bar
If the valve opening pressure is less than the minimum, replace the radiator cap.
Make sure that the pressure gauge on the tester does not drop too quickly when the pressure drops below 0.6 bar, this indicates the tightness of the valve.
3. Check the cooling system for leaks:
- A) Fill the system with coolant and connect the tester with a hose to the radiator neck as shown.
- b) Warm up the engine.
- V) Using a tester, pressurize the system to 1.2 bar and check that the pressure does not drop.
If pressure drops, check hoses, radiator and coolant pump for leaks.
If no leaks are found, check the condition of the radiator core, cylinder block and head.
4. Install the radiator cap.