The Coolant Bottle (also called Coolant Reservoir or Expansion Tank) is an important part of a vehicle’s engine cooling system.
🔧 Description:
It is usually made of durable plastic and is connected to the radiator.
Holds excess engine coolant and allows for expansion and contraction as the engine heats and cools.
Often marked with MIN and MAX levels for easy monitoring.
✅ Functions:
Stores extra coolant for the engine.
Maintains proper coolant levels in the radiator.
Prevents air bubbles from forming in the cooling system.
Helps the cooling system work efficiently by absorbing pressure fluctuations.
⚠️ Symptoms of a Faulty Coolant Bottle:
Visible cracks or leaks in the bottle.
Engine overheating or frequent low coolant warnings.
Coolant level dropping quickly.
Steam or coolant smell in the engine bay.
🚗 Importance:
A functional coolant bottle ensures consistent engine temperature, protects against overheating, and helps prevent serious engine damage.