HOW-TO SECTION Chemical Cleaner/Conditioner is used for heavy deposits or scale. user is urged to refer to the full text of this section to determine the proper dosage. Mixing of different manufacturers' technologies (brands) could cause cooling system problems. Summary of Coolant Recommendations 4. Maintain the inhibitor at the prescribed concentration. Test the nitrite concentration by using a titration kit or Detroit Diesel Power Trac 3-Way Coolant Test Strips. Add SCA only if the nitrite concentration is below 900 PPM. Do not use SCA in OAT coolant, and do not use Power Trac 3-Way Coolant Test Strips to test OAT coolant.
HOT COOLANT To avoid scalding from the expulsion of hot coolant, never remove the cooling system pressure cap while the engine is at operating temperature. Wear adequate protective clothing (face shield, rubber gloves, apron, and boots). Remove the cap slowly to relieve pressure. NOTE: If the nitrite concentration exceeds 3,200 PPM, the coolant must be drained and replaced with new coolant. A thorough cleaning of the cooling system may be required. 1. Always maintain the engine coolant to meet Detroit Diesel specifications. 2. Only use water that meets the specifications listed in Table 19. Distilled, de-mineralized (reverse osmosis) or de-ionized water is preferred. 5.
Do not use another manufacturer's test kit to measure the SCA concentration of Detroit Diesel maintenance products. 3. The proper dosage of inhibitors must be included in the coolant at initial fill for all Detroit Diesel engines. This dosage is usually included in the fully formulated antifreeze used, or it may need to be added if water alone or if less than 50% antifreeze is used. The 6. Pre-mix coolant makeup solutions to the proper concentration before adding to the cooling system. 7. Do not mix OAT and other coolants in the same engine. 8. Do not use automotive coolants. 104 All information subject to change without notice. DDC-SVC-MAN-0039 Copyright © 2009 DETROIT DIESEL CORPORATION