WHAT IS A TIMING BELT?
Timing belts have replaced timing chains on many of today's engines. Both belts and chains ensure that the crankshaft, pistons and valves operate together in proper sequence. Belts are lighter, quieter and more efficient than chains.
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WHY REPLACE THE BELT?
Like other components, timing belts wear out. Proper maintenance requires belt replacement at regular intervals--before they break.

WHERE ARE BELTS LOCATED?
Timing belts are on the front of the engine protected by a plastic or metal cover.

WHEN SHOULD BELTS BE REPLACED?
When a timing belt breaks, the engine stops. Replace belts before this occurs. Most manufacturers provide a suggested service life and replacement schedule for this critical component.

HOW DO I KNOW IF MY CAR HAS ONE?
Your vehicle manual may tell you, but you should ask your technician--he or she will know for sure.

WHAT HAPPENS WHEN IT BREAKS?
Your car stops ... dead! You can loose your power assisted steering and your power assisted braking.

THE GOOD NEWS (depends on what you call, "GOOD NEWS"). 
You'll only need a tow to a repair shop or service station and in addition to the tense moment and the inconvenience, you will need a new timing belt installed. That's all.

WHAT IS A "FREE-RUNNING" ENGINE?
If the timing belt breaks on a free-running engine, the engine stops and you will need a tow to the repair shop. No mechanical damage occurs and the installation of a new belt is usually all that is needed to get you on your way.
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THE BAD NEWS.
If your vehicle has an "interference" engine, your engine may have major internal damage. A broken timing belt can damage valves, pistons, cylinder heads and even cylinder walls. In addition to the inconvenience and the cost of the tow, you may need a new engine or parts thereof! 

WHAT IS AN "INTERFERENCE" ENGINE?
If the timing belt breaks on an interference engine, mechanical engine damage occurs. It most commonly involves open valves being struck by pistons, resulting in the need for expensive repairs. In extreme cases, a replacement engine may be required.
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