HOW-TO SECTION Discard unused strips if they have turned light pink or tan. HOT COOLANT A factory coolant analysis program is available through authorized Detroit Diesel service outlets. Part numbers are inrefer to section POWER COOL ENGINE PRODUCTS and refer to section POWER TRAC Coolant Testing And Analysis Products in the Specifications section. To verify coolant acceptability, submit a sample for coolant analysis every two (2) years, 300,000 miles (480,000 km), or 10,000 operating hours, whichever comes first. 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. For best results make the test while the coolant is between 50° – 140° F (10.0° – 60° C). Wait at least 60, but not longer than 75, seconds before reading the nitrite level. Use the test strips as follows: Need Release Coolant Filters (Non-OAT Systems) Spin-on coolant filters are available for Detroit Diesel engines. Membranes in the filters release SCAs before the coolant approaches a corrosive condition, protecting the engine from corrosion.
The elements release the SCA charge as needed, as opposed to the maintenance SCA elements, which instantaneously release the SCA charge. Coolant filter elements should be replaced after one (1) year, 120,000 miles (192,000 km) or 2,000 operating hours, whichever comes first. 1. Dip the strip into coolant for one second. Remove and shake briskly to eliminate excess fluid. 2. Immediately compare the pad end (% glycol) to the color chart on the container. 3. Sixty seconds (one minute) after dipping, compare the nitrite pad to the color chart. 4. Color change of the additive indicator (middle pad) indicates the presence of inhibitor that is not approved by Detroit Diesel.
Promptly replace and tighten the test strip container cap after each use. 112 All information subject to change without notice. (Rev. 04/08) DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION