F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
8. Advise the owner of the importance of using the proper 50/50 mixture of water and Ford E2FZ-19549-AA Premium Cooling System Fluid or
equivalent meeting specification ESE-M97B44-A that contains corrosion inhibitors. In addition, add 1.4 liters (1.5 quarts) of Heavy-Duty Cooling
System Additive FW-15 or equivalent meeting Ford specification ESN-M99B169-A.
9. If the appearance of the coolant is OK, use a hand-held refractometer, such as Rotunda Battery/Antifreeze Tester 014-R1060 or equivalent to
verify proper coolant concentration. The range is (minimum) 45/55, (maximum) 60/40.
10. If the cooling system is found to be low on coolant, top off only with a premixed solution.
11. If a weak concentration is found, add straight coolant sparingly until concentration readings are within acceptable levels.
12. If too strong a concentration is found, remove a small volume of coolant and add water sparingly until coolant readings again fall within the
specified levels.
13. Recheck coolant concentration to make sure the coolant has been brought into the proper concentration.
NOTE: Make sure coolant is thoroughly mixed before taking readings. This is accomplished by running the engine until the water thermostat
opens.
