2.3.22. Coolant pressure cap z Check the pressure valve opening pressure using an expansion tank cap tester. Radiator cap z Replace the filler cap assembly if the measured valve does not reach Radiator the specified limit. NOTE : Because it is dangerous to open the pressure cap quickly when coolant is hot, after lowering the inside pressure of the tank by slow- opening at first open it fully. Drain valve 2.2.23. Cooling water z We recommend the coolant for engines should be mixture of fresh water and additional agent (33 ~ 50% anti-freeze and 3 ~ 5% anti-corrosion agent). z Check the quantity of anti-freeze every 600 hours. From time to time, refill the anti-freeze as much as required.
NOTE : Suitable mixture of anti-freeze and-corrosion agent can protect the engine corrosion from deteriorating and raises a boiling point, but by using unsuitable mixture engine components like water pump impeller and water jacket of cylinder block may be occurred a malfunction by any bad corrosion damage or cavitation. z You can check the quantity of anti-freeze and anti-corrosion agent by using a FLEETGUARD test kit simply as follow. (Fleetguard CC2602M or DOOSAN 60.99901-0038) DL06 Diesel Engine Technical Information 33