Know what revs your engine? The device that powers your car is one of the most amazing inventions in modern history – and one of the most complex if you don’t know your camshaft from your alternator. But don’t let that intimidate you. You don’t have to know everything, but it’s quite cool to know a little – if only to recognise that mechanics do actually speak English!

Remember: Never open your car’s bonnet when it’s hot. Wait for it to cool down before sticking your head under the hood.

Tip:
If you drive through a big puddle and your car conks out, the spark plugs might be wet. Pull over in a safe place and wait for 15 minutes. Once dry, your car should start again.

Terms

Radiator
A “heat exchanger” designed to transfer heat; ergo, it keeps your car from overheating. Situated at the front of the engine, it’s where you put the engine coolant.

Spark Plug
Ignites the air/fuel mixture, starting the combustion process, which gets the engine running. If your car is misfiring, check the spark plugs – they need replacing more than most other parts. (Diesel engines don’t have spark plugs.)

Fan Belt
This is the black rubber belt that powers all sorts of pumps and motors. You can check it yourself for cracks and frays.

Battery
Car won’t budge? It might be your battery, which supplies electric energy to the engine. Tip: When a new battery is fitted, write the date on it in permanent marker.

Cylinder
Basically, the engine is built around the cylinders. It’s inside these that the fuel burning takes place. Cars usually have four, six or eight of them, hence terms such as “in-line six” (BMWs) or “V8” (muscle and other powerful cars). The “V” refers to their arrangement in a V format.