Cooling System - Maintaining Proper Coolant Levels
87mazda03Category Applicable Model/s Subject Bulletin No. 008/87
3 All Models ENGINE COOLANT Issued 7/16/87
Revised
DESCRIPTION
The proper level for the coolant is between the "FULL" and "LOW" marks on the coolant reservoir.
If the level is below the "LOW" mark when the engine is cool, add enough 50/50 mixture of water and ethylene glycol anti-freeze mix to bring the level up to or near the "FULL" mark. Do not overfill.
In addition to freezing protection, ethylene glycol provides corrosion protection for aluminum engine parts.
CAUTION WHEN ADDING COOLANT
1. If water only is added, the mixture ratio of coolant will be reduced, which may result in the following:
Rust or corrosion in the engine
^ Water leakage or overheating caused by rust or corrosion in the radiator
^ Water leakage due to corrosion of the water pump at the seal
2. If the reservoir is overfilled, a rise in coolant temperature will cause expansion of the coolant volume, which will allow some coolant to overflow. The customer may misunderstand this overflow to be a mechanical problem.
CAUTION WHEN REPLACING COOLANT
After replacement, set the heater control lever to the "HOT" position and warm up the engine to the normal operating temperature (thermostat fully open). Check that there are no coolant leaks.
Add additional coolant as needed so that the radiator is full and the coolant level is at the "FULL" mark on the coolant reservoir.
NOTE:
If you encounter a reservoir bottle, that is empty, it is likely that the level of coolant inside the radiator is also low. In such a case always...
Wait until the engine is cool and then remove the radiator cap. Add coolant as needed to bring the level inside the radiator up to full.
Pressure check the radiator and radiator cap for leaks. Also perform general check of coolant system.