Chapter 50 PowerPoint

Define these Technical Terms using the textbook:

1. camshaft phaser

2. engine sludge

3. external oil leakage

4. faulty oil pressure switch

5. high oil consumption

6. low oil pressure

7. oil change intervals

8. oil dye

9. oil pressure test

Answer these discussion questions using the textbook:

1. How do you measure engine oil pressure?

Read the chapter summary below:

■ Without a properly functioning lubrication system, an engine will seize or "lock-up" in a matter of minutes.

■ High oil consumption is caused by external oil leakage out of the engine or by internal oil leakage into the combustion chambers.

■ External oil leakage is easily detected as darkened, oil-wet areas on or around the engine.

■ Internal oil leakage shows up as blue smoke coming out of the exhaust.

■ Low oil pressure is indicated when the oil indicator light glows, the oil gauge reads low, or the engine lifters or bearings rattle.

■ An oil pressure test uses a test gauge installed on the engine to measure actual lubrication system pressure.

■ Used oil will be contaminated with dirt, metal particles, carbon, gasoline, ash, acids, and other harmful substances.

■ Auto makers specify oil change intervals. (Not oil companies, and not oil change facilities)

■ A common mistake by the novice is over-tightening the oil pan bolts.

■ A bad oil pump will cause low or no oil pressure and possibly severe engine damage.

■ Before installation, the oil pump should be primed by filling it with motor oil.

■ A faulty pressure relief valve can produce oil pressure problems.

■ A faulty oil pressure switch or sending unit can make the indicator light glow or the gauge read low when oil pressure is normal.

■ To analyze the operation of camshaft phasers with a scan tool, compare the camshaft sensors’ signals for both cams at different engine speeds.