Remember the first carburettor you took apart? Maybe you worried about getting all those parts back where they belonged, or the adjustments had you confused. But then, with an understanding of basic systems plus a look at the Service Manual, the next job went easier and it all became routine.
As emission control standards get tighter, carburetion and ignition requirements become increasingly critical. We all want clean air and are ready to do our part to reduce vehicle emissions. However, providing both clean exhaust and acceptable engine performance standards does present a real challenge to both the design engineer and the service technician. Since owners aren't ready to accept any reduction in driveability, you service technicians
on the tune-up front have your work cut out for you.
Chrysler engineers have developed a new electronic ignition system that eliminates the breaker points and the service and performance problems associated with them. The new electronic system controls ignition timing and
dwell very accurately, resulting in maximum exhaust emission control with minimum ignition system service.
Such obvious things as soft and leaky brake calliper piston seals lead to suspecting something else as the basic cause of the trouble. Hydraulic system rubber parts work well with brake fluid, but break down when exposed to small amounts of oil, so handle these parts with special care.
One way to increase the use of lap belts is to remind the driver to fasten his before the car is under way. And, since the right front seat is the most dangerous place to be sitting in the average highway accident, the driver should also be warned if the front seat passenger's lap belt is not fastened. As part of their contribution to highway safety, Chrysler Corporation is now equipping all of the cars it produces with a very effective seat belt warning system. This may not force every driver to fasten his lap belt but things will be "buzzin" if he doesn't. He can't say that we didn't warn him!
It is much less generally known that there are several different ways of controlling the amount of heating or cooling and there are additional differences in the way the airflow and distribution is controlled. As a matter of fact, on 1972 Chrysler built cars there are three significantly different systems . . . and that's not counting sub-compact and truck air-conditioning systems.
To help make wheel alignment easy to understand, Tech suggested that this session should follow a "tell 'em what happens" approach to describe the basic alignment angles and to explain their functions. Since the coverage is concerned mainly with fundamentals, no attempt is made to include the adjustment instructions and specifications found in the Service Manuals.
Since the birth of the automobile, manufacturers have concentrated on making their cars known for certain qualities, and have used certain features that appeal to the buying public to sell their cars. Such things as styling . . . horsepower . . . comfort . . . and economy. Since the early sixties, much concentration has been centred on still another quality that has always been a consideration through the years - SAFETY.
Did you ever wonder how the speed-control system works? Chances are you never would be able to figure it out for yourself. Since the servo unit is serviced as an assembly, you probably have had no reason to disassemble one of them. Even if you did take the servo apart, the odds against understanding the internal and external circuitry are rather great. In other words, about the only way you'll understand how the speed-control system works is to have someone explain it to you. That's exactly what Tech has done in this Reference Book.
The basic requirements for good engine carburetion are essentially the same, regardless of engine size or number of cylinders. Obviously, carburettors differ in capacity and design, but they are all required to provide the appropriate air/fuel mixture and amount of mixture that is needed for efficient, low-emission operation at all speeds and loads.
This month's session deals with three options offered on Chrysler Corporation cars that are not only conveniences to drivers but contribute to their safety as well. Featured in this month's session will be power door locks, the power "Auto-Lock" tailgate, and power windows.
Most of today's tire problems occur because cars are being driven faster and farther than ever before. One of these problems is a shake condition which can be felt but not heard. This occurs only at highway speeds, usually above sixty miles an hour. Another condition caused by tires is commonly referred to as roughness. This can be heard as well as felt. It occurs at both high .and low speeds. This Tech session deals with the causes, diagnosis and correction of these tire problems.