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7. Vehicle Components

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Antifreeze is considered by many to be "one-size-fits-all" as most antifreeze brands have a distinctive lemon-lime color. However, the actual formulations can vary greatly between types, such as the new RED antifreeze. Conventional antifreeze is formulated from an ethylene glycol (EG) base chemical and can have very serious health risks.

It is estimated that each year 90,000 pets and other wildlife die from accidentally ingesting ethylene glycol based antifreeze. Animals are attracted to antifreeze for its sweet smell and taste. Animals, and children for that matter, can accidentally ingest antifreeze from spills, cooling-system leaks or improperly stored containers. Because of this the U.S. Government has initiated strict laws and penalties as the result of contamination of water or ground areas. Even a leaky vehicle can get you into trouble.

As an alternative, automotive chemical manufacturers have formulated a newer type of antifreeze using propylene glycol (PG) instead of ethylene glycol, which is less harmful if accidentally ingested. A popular brand is SIERRA® , which was the first nationally marketed propylene glycol based antifreeze.

Safer, propylene glycol based antifreeze provides performance and protection comparable to conventional ethylene glycol based antifreeze in four key areas of engine protection: boil over, freeze-up, corrosion and heat transfer. SIERRA®, and other propylene glycol based antifreeze products are available nationwide, and can be the extra margin of safety to protect your children, pets, drinking water, and neighborhood wildlife.

Lesson Summary


  

Lesson 7 Quiz


You will now answer 5 questions to test what you learned during this lesson. You must answer all questions correctly to receive completion credit for this lesson. You may answer the questions as many times as necessary to get them right.

You should review the lesson material if you don't do well on the quiz.

  1. The engine in your car is sometimes called:


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  2. Disc brakes work by:


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  3. The ALTERNATOR:


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  4. The minimum tread thickness for passenger car tires is:


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  5. This oil warning light means that:


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