Engine Lubrication System Inspection and Service
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Questions and Answers

What is the primary purpose of an oil cooler?

  • To improve the efficiency of the engine's cooling system
  • To transfer the maximum amount of heat from the coolant to the oil
  • To reduce the pressure in the lubricating system
  • To regulate the temperature of the engine oil (correct)
  • What is the likely cause if the oil inlet and outlet temperatures are very similar?

  • The oil pressure is too high
  • The oil cooler is working efficiently
  • The engine is running at an optimal temperature
  • The coolant line or cooler core is plugged (correct)
  • What is the consequence of an internal leak in the oil cooler?

  • The oil pressure will drop
  • The engine will seize up
  • The engine will overheat
  • The cooling system will become contaminated (correct)
  • What should be done if major engine damage occurs?

    <p>Both a and b</p> Signup and view all the answers

    What can happen if the oil cooler's integral thermostat sticks in the closed position?

    <p>The oil will not be cooled effectively</p> Signup and view all the answers

    What is the purpose of cleaning the surrounding area before opening any coolant or oil line?

    <p>To prevent contaminants from falling into the oil or coolant lines</p> Signup and view all the answers

    What should be done to the cooler core tubes or fins during the repair process?

    <p>Both b and c</p> Signup and view all the answers

    What is the purpose of draining the coolant and oil into separate recycling containers during the oil cooler removal process?

    <p>Both a and b</p> Signup and view all the answers

    What should be done to the gasket surfaces before testing the oil cooler?

    <p>They should be cleaned and smoothed</p> Signup and view all the answers

    What type of cleaning solution should be used to clean the oil and coolant passages of the oil cooler?

    <p>A mild, non-corrosive cleaning solution</p> Signup and view all the answers

    Which statement is true regarding oil pumps?

    <p>It's advisable to consult the appropriate service manual when working on oil pumps.</p> Signup and view all the answers

    What is recommended when assembling oil pump components?

    <p>Coat the surfaces with the type of engine oil that will be used in the engine.</p> Signup and view all the answers

    Where can the oil pressure relief valve assembly and pressure regulating valve assembly be located?

    <p>They can be either integral parts of the oil pump assembly or separate assemblies on the engine.</p> Signup and view all the answers

    What precaution should be taken when removing oil pressure control valves?

    <p>Control the pressure spring located within the valve assembly using appropriate tools and caging devices.</p> Signup and view all the answers

    What is the potential risk if the pressure spring and valve are not properly controlled during removal of oil pressure control valves?

    <p>Serious personal injury can occur if the spring and valve fly out in an uncontrolled manner.</p> Signup and view all the answers

    What should be followed when removing oil pressure control valves?

    <p>Follow the procedure in the service manual and use the appropriate tools and caging devices.</p> Signup and view all the answers

    What is the purpose of pressure testing an oil cooler?

    <p>To ensure fluid does not pass between oil and coolant sections</p> Signup and view all the answers

    Why is it essential to remove the dipstick when working on the oil pump?

    <p>To prevent damage to the oil pan or gasket surfaces</p> Signup and view all the answers

    Where are some oil pumps located in an engine?

    <p>Behind the front pulley and driven by the crankshaft</p> Signup and view all the answers

    What should be done before removing the oil pump from an engine?

    <p>Disconnecting the oil temperature and level indicator sending units</p> Signup and view all the answers

    When removing an oil pump from an engine, what components should be inspected visually?

    <p>Pressure relief valve assembly and gears</p> Signup and view all the answers

    Why is it recommended to immerse the cooler in warm water during pressure testing?

    <p>To detect signs of air bubbles indicating a leak</p> Signup and view all the answers

    What can be inferred from a combination of overall inspection and oil pressure reading of an oil pump?

    <p>Suitability of the pump for rebuilding or replacement</p> Signup and view all the answers

    Why is it important to have a co-worker's assistance when lowering the oil pan?

    <p>To prevent dropping the pan on the shop floor and damaging it or gasket surfaces</p> Signup and view all the answers

    What does observing signs of air bubbles during pressure testing indicate?

    <p>A leaking condition between different sections of the cooler</p> Signup and view all the answers

    Why should you thoroughly clean the lower engine and oil pan while removing an oil pump?

    <p>To prevent dirt and debris from entering sensitive pump components during inspection</p> Signup and view all the answers

    What is the primary benefit of having a single individual responsible for the engine lubrication system inspection and service process?

    <p>All of the above.</p> Signup and view all the answers

    What is the primary purpose of the visual inspection process when an engine is due for servicing?

    <p>To identify problems that may be due to poor lubrication and/or unusual operating conditions.</p> Signup and view all the answers

    According to the passage, what is one indication that the engine may have been operating at a very light load or with too cold of an operating temperature?

    <p>Presence of oil and fuel residue on the exhaust pipe.</p> Signup and view all the answers

    What senses should be used during the visual inspection process when checking the engine oil on the dipstick?

    <p>Sight, touch, and smell.</p> Signup and view all the answers

    What is the primary purpose of changing the oil type to meet new engine demands?

    <p>To maintain optimal engine performance.</p> Signup and view all the answers

    What is the primary benefit of having a consistent individual responsible for the lubrication system inspection and service process?

    <p>Ability to quickly identify and address changes in engine operation.</p> Signup and view all the answers

    What is the ideal approach to establish the oil and filter change interval?

    <p>Using the results of an oil analysis program</p> Signup and view all the answers

    Why is it crucial to use a consistent pressure gauge for oil pressure testing?

    <p>Different gauges may provide conflicting readings</p> Signup and view all the answers

    What is the purpose of using a high-pressure gauge initially when conducting oil pressure checks?

    <p>To ensure a more accurate reading</p> Signup and view all the answers

    When should a mechanical pressure gauge be used for engine oil pressures?

    <p>To maintain consistency in pressure testing</p> Signup and view all the answers

    What is the recommended practice for checking the oil pressure system?

    <p>Use a mechanical pressure gauge designed for this purpose</p> Signup and view all the answers

    Why is it advised to maintain consistency in oil and filter change intervals?

    <p>To ensure maximum oil use and engine protection</p> Signup and view all the answers

    What is the consequence of using different gauges at various times during oil pressure tests?

    <p>Inaccurate test results over time</p> Signup and view all the answers

    When should a lower reading gauge be used during oil pressure checks?

    <p>After obtaining the first pressure reading with a high-pressure gauge</p> Signup and view all the answers

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