See Figures 1, 2, 3, 4, 5 and 6
Don't run an engine in a garage without proper ventilation - EVER! Carbon monoxide is poisonous; it takes a long time to leave the body and you can build up a deadly supply of it in your system by simply breathing in a little every day. You may not realize you are slowly poisoning yourself. Always use vents, windows, fans and/or open the garage doors.
Don't work around moving parts while wearing a necktie or loose clothing. Short sleeves are much safer than long, loose sleeves and hard-toed shoes with neoprene soles protect your toes and give a better grip on slippery surfaces. Jewelry such as watches, belt buckles, or body adornment of any kind is not safe for working on a car. Long hair should be hidden under a hat or cap.
Don't use pockets for toolboxes. A fall or bump can push a screwdriver deep into your body. Even a rag hanging from your back pocket can wrap around a spinning shaft or fan.
Don't smoke at any time when working with gasoline, cleaning solvent or other flammable materials.
Don't smoke when working around the battery. When the battery is being charged, it gives off explosive hydrogen gas.
Don't use gasoline to wash your hands; there are excellent soaps available. Gasoline contains many additives which are harmful. Gasoline also removes all the natural oils from the skin so that bone dry hands will suck up oil and grease.
Don't service the air conditioning system unless you are equipped with the necessary tools and training. The refrigerant is extremely cold and when exposed to the air, will instantly freeze any surface it comes in contact with, including your eyes. Although the refrigerant is normally non-toxic, R-12 becomes a deadly poisonous gas in the presence of an open flame. One good whiff of the vapors from burning refrigerant can be fatal. Remember, it is advisable for a reputable service station to work on your air conditioning system.
Fig. Fig. 1: Jackstands should be always used when working under your vehicle
Fig. Fig. 2: Make certain that all electrical tools are grounded properly
Fig. Fig. 3: When using a screwdriver, make certain that it is the correct size and the tip is in good condition. (A) is a good screwdriver, (B) should be thrown away
Fig. Fig. 4: When using a wrench, make sure you use the correct size. If not, you could strip the nut
Fig. Fig. 5: Identification chart of various bolts and nuts
Fig. Fig. 6: Figure out the dimensions of bolts in this way