For filling up the system you will use 7.3 liters of special Red coolant type. It’s better to choose fluid in combination of 1986 year, 2.4 volume of motor and engine code of RE13B. Don’t underestimate the importance of Mazda’s 2.4 engine cooling system. Otherwise RX-7 made in 1980 won’t serve you long enough. There are some conditions in servicing cooling module at Mazda RX-7.
To endure car life take only Red antifreeze and pour not more or less than 9.5 liters. Every Mazda owner should remember that engines with code 12AN2 are quite demanding. Providing you keep the rules 2.4 motor installed in RX-7 of 1987 year will be long lasting. It will be advantageous to follow Mazda’s rules for 1982 RX-7 service.