Why is your 93 rx7 leaking coolant from the overflow tank on cooldown replaced caps and heaters work fine?

Why is your 93 rx7 leaking coolant from the overflow tank on cooldown replaced caps and heaters work fine?
The cap may not be properly sealed or the breather hole in thereservoir may be faulty. It is also necessary to check the overflow tank for flaws. If everything is fine, it may be time tochange the engine.