May 18th, Last Day, Final Exam!!!!!!

Next Saturday will be the last day for us. I’ve enjoyed the time with each and everyone of you, and I wish it could go on longer. The test will be before break, but everyone is required to stay until 12:00.

Here , are the answers to all the quizzes, except the ASE one, please know the 8 + 1 ASE certifications.

The Final Exam will be 50 questions and draw from these, plus a few safety questions.

Thank you for a great semester!

-Ray.

Extra Credit Assignment

This assignment will be graded to a maximum of 100 points towards participation. It is due on or by the 18th. It is a simulation of a Work Order that is also used as an estimate and an invoice. It also requires looking up the information needed and knowing the difference between a flat rate guide and service information. You need to find the information from the given sources yourself. That is the assignment. You will find the part cost, labor times, specifications, and repair information. Just follow this procedure step by step.

First, download the Work Order , or Repair Order but most commonly just called RO. Fill it out to look something like this. Fill in the blue highlighted area with your name, date, and a vehicle. Add the phrase “Check and Advise” to the brake noise and oil leak concern. Choose from: 2003 Ford Mustang; 2001 Chevrolet S10 Pickup; 2001 Ford Escort; or a 2009 Nissan Altima for the Year-Make-Model area. Any of these will do.

At this point, you have a signed estimate authorizing work up to $100. The customer was verbally informed by the service advisor that the diagnosis charge would be applied to any work performed, a common practice. The customer will be given a copy of this estimate. This is typical of an estimate that is used as a work order and is given to the mechanic.

If your car is the Mustang or the S10 Pickup, go to Mitchell1 and navigate to the demo tab and pick your vehicle. If it is the Escort or the Altima, go to ALLDATA and click the “Sample Vehicle” tab.

As a mechanic, you diagnose the vehicle and find the front brake pads, front rotors, and rear brake pads measure under the minimum thickness specifications and that the valve cover gasket(s) is/are leaking. If your car has two valve covers, V-6 or V-8 engines, then both are leaking.

You flip the RO over and use the back for notes. This is a copy of what I typically write on the back. The numbers are from my memory of BMW’s, so use your own numbers, but copy this format. Tire pressures are required by law to be checked anytime a vehicle is in for service. Make up the measured pressures but find the specifications from the online source. Probably under the maintenance-tires area.

Next, find the specifications for the front brake pads, front brake rotors, rear brake pads, and rear rotors. Make up some values for the front pads and rotors, and rear pads that are below the specifications. The rear rotors are a little above their specification and do not need replacement. Write down the specification for comparison. These written measurements will cover you if there are any questions later.

Below that is the work that we will recommend. Find the labor times for the front pads, front rotors, rear pads, and the valve cover gasket or gaskets. You will see two times, the factory warranty times and the standard times. We will use the standard times, because it pays better. Again, my figures are for a BMW, use your online source for this vehicle.

Flip the Repair Order back over and list the parts on the left hand side, filling in the part numbers and part prices. The RO will now become an invoice and look like this . The first price column is for each part and the second column is for the total quantity of that part. The pads come in a single set, but there are two rotors so the rotors will be times two. The same for the valve cover gaskets if you have two. Fill in the description of work and adding the dollar value of your labor times at a rate of $100 per hour. (0.9 is $90, 1.2 is $120) Add up the total labor charges and write it in that blank. Below that, total up the parts. Multiply the parts by 0.085 for the tax, labor is not taxed. Add up the labor, parts, and tax and enter that value for the total. Also, add these to the revised estimate to make it legal.

Find and print out the repair information for these operations. This should be in a different area than the pricing. You should have four operations to print out, the front pads, the front rotors, the rear pads, and the valve cover gaskets. Attach these print-outs to the completed invoice.

For May 11

Quiz 8 has been postponed to the 11th, and it is on chapters 47 and 49. We will be preparing for the final, making up missing quizzes and assignments, and working on engines.

For May 4th

We have three more weeks, Final Exam is on May 18th!

The last chapters are 45 Cooling systems and 49 Lubrication. So the ASE questions to help you with the quiz. The take away from my ramblings is that the cooling system removes excess heat energy from the engine. This starts in the cooling jackets and uses the water pump to transport the hot antifreeze to the radiator, which releases the heat outside of the engine. The cooled antifreeze is transported back to the engine to absorb heat. Pressure and antifreeze content raise the boiling point of water, increasing the amount of heat it can absorb and release, and also increasing combustion efficiency. Radiator efficiency is affected by air flow, surface area, and the difference in temperature in the air flow and surface area.

Next Saturday will be set aside for quiz make-ups. If you cannot make it on the 4th, I will extend this to the 11th, but it leaves yo with less time until the 18th. I have given you lists of quizzes that are missing. If you don’t know, then text me at 714-348-1376.

I am giving you all the chance to retake one quiz at no penalty.

Unless otherwise specified, for the missing quizzes, there will be a ten percent drop in quiz score, but it is much better than zero. Some of you may not pass this class due to missing assignments and quizzes. I strongly encourage you to study and make up the quizzes. This will improve your grade and you will get correct answers. The final will come from these quizzes and a few from the midterm assignment.

EXTRA CREDIT! I’m working on this now, check back!

Assignment For April 27

Read Chapter 40 fuel systems and answer the ASE questions at the end. On the graphics on page 697 shows the evolution of fuel delivery starting from the bottom diagram up. Carburetor systems were low pressure, around 3 PSI (Pounds per Square Inch) and typically had a mechanical pump attached to the engine. Because of low pressures drawn on the fuel lines from the tanks, the fuel could boil and suffer vapor lock in the lines. Fuel Injection arrived to atomize fuel delivery with a fine spray. It needed higher fuel pressures, 35-45 PSI, so the fuel pump was relocated back to the fuel tank to avoid low pressure vapor lock. Single Point Injection used one or two large fuel injectors that were common to all cylinders at the throttle body (cheap and not very effective), and Multi-Point Port Injection (superior), using several injectors, one at each cylinder, spraying right before the intake stroke. Direct Injection is the latest and greatest fuel system for gasoline engines. These use an in-tank pump to deliver fuel (~50 PSI) to an engine mechanically driven high pressure pump. The Super-fast injectors and dangerously high pressures, 750 to 3,000 PSI, can inject fuel directly into the cylinder during compression and power stroke for a more versatile, controlled, and efficient fuel burn. FYI, Diesel engines, by nature, have always used direct injection since the beginning of time.

Read Chapter 45, Exhaust systems and answer the ASE questions at the end.

For April 20th

Please read Chapters 34 (Ignition systems) and 39 (Fuels and systems), and complete the ASE questions in the back of each chapter.   There will, of course, be a quiz.

It’s time to start thinking about how our engines work and start putting them back together.  Our teams need to work together as a whole to get all 6 engines running.

April 6, 2019

You’re all doing great on the team work exercises! For the next class, study chapters 13, 14, and 15, and complete the ASE type questions at the back of each chapter. Be prepared for a quiz on those chapters. If you were not prepared for the last quiz, you now have six chapters due, 11 through 16 with the ASE questions and two quizzes. Have a great week!

March 30, assignment for April 6

If you haven’t completed the midterm assignment, I will allow you to bring it in on Sat.

Read chapters 11, 12, and 16 and do the ASE style questions in the back of each chapter. Be prepared to turn in your homework and take a quiz first thing. I will assign new random teams and we will continue disassembling the engine and begin measurements. I will have another rush presentation ready for chapters 13, 14, and 15.

You can download the power point presentation for chapters 11, 12, and 16 if it helps.

Agenda for March 16, the Saturday before Spring Break!

Were are on Rio Hondo’s schedule and their spring break for us in on the 23rd.

I would like to wrap up the first half of this class before break. Please review chapters 6 and 8, as the quiz has two questions from the text that were not in the presentation. Be sure and read up on thread repair (hint). BTW, there is a question of supplying the chapters to you electronically. I will try to get an answer before the next assignment.

I would like to give the chance to catch up on missing quizzes and participation with a one letter grade reduction (just to be fair to others).

I’m trying to set up a shop/lab activity that can be done in conjunction with makes ups and review.

For those who missed the 16th, also watch:
Reading a Micrometer
Vernier Caliper Scale
Feeler Gauges