ENGINE MAINTENANCE - Maintenance Procedures Checking Coolant Condition Recommended coolant checks. quality, contamination, or mechanical problems, submit a coolant sample to your dealer for analysis. Improper maintenance may cause coolant deg- radation and could result in damage to the cooling system and engine compo- nents. Consult your dealer or the cool- ant manufacturer's representative for recommended extended life coolant test kits, test strips, and laboratory sample procedures. Coolant Shutoff Valve To ensure the Extended Life Coolant (ELC) in your vehicle always provides maximum protection, perform the following tests: 1. Check the coolant color at every maintenance interval.
It should have no cloudiness, floating debris, or oils. 2. Test the freeze point at least twice a year. A refractometer or test strips can be used to measure the protection level. 3. Determine the pH and chemical inhibitor concentration level by using an ELC-specific test kit or test strips. 4. Keep the cooling system full by topping-up using ELC pre-diluted to a 50/50 blend, unless a different ratio of water/antifreeze has been substituted (depending on operating conditions). 2 Radiator Hoses Maintenance checks for radiator hoses. Perform these maintenance procedures according to the Preventative Maintenance Schedule. 1. Check the following radiator hose conditions:
Hose condition, deterioration/ signs of leaking. Hose clamp torque. Replace Coolant Filter Procedure for removing coolant filter. 1. Slowly loosen the radiator cap to relieve any pressure in the cooling system. 2. Close the coolant filter shutoff valve by rotating the hex key clockwise and away from the “O” position. NOTE Inhibitor concentration level deter- mines corrosion protection. If you are concerned about possible coolant Perform these maintenance procedures according to the Preventative Maintenance Schedule. Y53-1166-1G1 (08/2018) 65