Tune-up? What's A Tune-up? - The Trainer Series
Duration: 5 minutes and 56 seconds
In the days of points ignition systems and carbureted engines, mechanical adjustments had to be made every 15,000 miles in order to insure peak performance. With the introduction of computer engine management systems, fuel injection and electronic ignitions of varying designs, the need for periodic mechanical corrections has been all but eliminated.
The need for routine maintenance, however, is as critical today as it has always been!
Modern engines run on extremely tight tolerances. For example, the piston-cylinder clearance on a 2010 Kia Forte 2.0 is 0.0005" to 0.0013". That's 5 to 13 ten thousands of an inch! Compare that to a 20-year-old Toyota four banger that allowed a sloppy 0.024" to 0.031" clearance between the piston and cylinder wall. Now consider what will happen to that Kia's piston fit if engine oil isn't changed as it should be, or air filters are allowed to pass dirt and other contaminants into the combustion chamber. How do you think that affects the engine's longevity and performance?
These tighter tolerances aren't just in the major engine components either. Control module strategies have gotten more precise, and pass/fail thresholds aren't as forgiving as they used to be. All necessary to improve efficiency, gain ground in fuel economy and still produce the power we all want to experience when we step on the pedal. Fuel injectors get dirty, intake tracts carbon up, spark plugs wear...just not all at the same time or the same rate!
Let's not forget the rest of the car, either. Performance is a package deal. The other systems on the car (suspension, steering, braking, etc.) need to be routinely checked and corrected to insure that the total package functions as the OE designers intended.
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