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We also explained how the cooling system works.
How to Spot Trouble:
We had quite a few failed parts available for “hands-on” contact. We demonstrated where a radiator hose commonly gets soft prior to bursting (on the outside radius of a bend where the hot coolant comes out of the engine). We showed them a number of belts in various stages of failure. One student found a bad hose on her own car during the clinic.
No instructions were given on how to repair their car, or how to change their own oil. We did, however, accidentally repair one car. The owner reported the car had a poor idle quality and stalled frequently. While doing the under-hood check, we found the PCV hose unhooked, causing a massive vacuum leak. Reinstalling the hose fixed the idle and stalling concerns. Rule number one: always look for the obvious!
We also studied disc and drum brakes. The parts were shown both on and off the car. Each student held a set of brake pads and examined what a “wear indicator” looks like and how it functions.
Tires were studied. We had on hand a number of tires with different problems. We learned about some common symptoms that relate to tire failures.
This segment of the class concluded with a showing of the underside of a car and an explanation of the various steering, suspension and exhaust components.
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