This is actually a good explanation of plug heat ranges. It is hard to find an explanation of what people mean by hotter or colder plugs. I am not a mechanic but when I ask people who say they are they may be able to get you the right plug which I guess is the main thing but not necessarily explain what the actual difference is that makes it a hotter or colder heat range plug. I'm sure the designs of plugs have changed somewhat over the years but I feel like this is one of the only decent explanations I have found
Although this may be obsolete, it actually isn't. If you don't understand the basics of the ignition process, there's no way to understand subsequent systems.
I worked as mechanic in the military. Retired after 20 years. I couldn't work on cars today w/out having to go back to school. Today, you almost have to have a computer science/electrical engineering degree in order to work on cars. Modern automobiles are high tech. A cars system now comprises of system computer, several modules and sensor detecting/sending information back and forth to each other through miles of wiring crammed into tight spaces. The pay does not seem enough for what a modern day automotive technician have to learn. With advances in technology technicians have to stay on top of the latest automotive technology or risk becoming obsolete.
Thank you for sharing these vintage films. Love watching these mechanics at work. 15:00 I don't think there was much workplace safety being enforced back then. No OSHA until 1970. No PPE like gloves when handling solvent. Automotive shop workers are especially vulnerable to chemicals and other workplace hazards, which is why the U.S. Department of Labor and the Occupational Safety and Health Act of 1970 established workplace standards for auto mechanics and the shops they work in.
