(4) Compare the end pad “a)” color of the strip with color block of a row at the upper part of the standard color chart (bellow of the letter “GLYCOL/FREEZEPOINT”). Same color in the block of the row means the content of anti-freeze in the coolant. (Normal range is between 33% and 50%) (5) Compare the middle pad “b)” color of the strip with the color that the column block color of MOLYBDATE at the left side of the table intersects the row block color of NITRITE at the bottom (pad “c)” color of the strip) on the table “SCA Units per Litre”. (Normal range of “SCA Units per Litre” is between 0.3 and 0.8 : “green color area”) NOTE:
During the comparison, if uncertain about color match, pick the lower numbered block. (example : if the color of NITRITE pad is between standard color “D” and “F”, then use column E) (6) If the value of “SCA Units per Litre” is less than 0.3, refill the DCA4 liquid (anti- corrosion agent) a little, but larger than 0.8, drain some amount of engine coolant and replenish the fresh water instead. The content of the anti-freeze and anti-corrosion agent can be regulated by this way. NOTE: Every year coolant must be replaced. It is essential the coolant should be mixture of fresh water, proper anti-freeze and anti-corrosion agent. DL06 Diesel Engine Technical Information 35