Coolant spilled out of radiator

An overheated engine will spew coolant from the radiator or overflow cap. The coolant expands as the engine heats up. If the pressure cap is loose or damaged, coolant can leak out of it. The leak may not be severe. The coolant level may rise as the coolant expands. When the engine cools, a low coolant indicator light may come on indicating a drop in the coolant level.

Table of Contents

• 1. Causes
  • 1.1 Damaged or Loose Pressure Cap
  • 1.2 Hole in Radiator

Causes

Damaged or Loose Pressure Cap

The pressure cap keeps the cooling system under pressure. If it is damaged or loose, as the engine temperature rises, the coolant expands and can leak out.

Hole in Radiator

A hole in the radiator will provide an avenue for coolant to leak out.