&lt;p>An overheating engine is not an uncommon occurrence as a neglected vehicle ages. An old, malfunctioning radiator or cooling fan is all it takes to send the engine temperature high into the red zone. Combine an overheated engine with the numerous flammable liquids that keep a car running, including engine oil, automatic transmission fluid, hydraulic brake fluid and engine coolant (ethylene glycol), and you have a recipe for disaster. The exhaust manifold on a hot-running engine can reach in excess of 500&amp;deg;C &amp;ndash; high enough to ignite any of these liquids oozing from a leaky seal.&lt;/p>