Engine Lubrication System Inspection and Service

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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?

Both a and b (D) Signup and view all the answers

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

The oil will not be cooled effectively (A) Signup and view all the answers

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

To prevent contaminants from falling into the oil or coolant lines (A) Signup and view all the answers

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

Both b and c (D) 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?

Both a and b (D) Signup and view all the answers

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

They should be cleaned and smoothed (D) 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?

A mild, non-corrosive cleaning solution (D) Signup and view all the answers

Which statement is true regarding oil pumps?

It's advisable to consult the appropriate service manual when working on oil pumps. (C) Signup and view all the answers

What is recommended when assembling oil pump components?

Coat the surfaces with the type of engine oil that will be used in the engine. (C) Signup and view all the answers

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

They can be either integral parts of the oil pump assembly or separate assemblies on the engine. (B) Signup and view all the answers

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

Control the pressure spring located within the valve assembly using appropriate tools and caging devices. (A) 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?

Serious personal injury can occur if the spring and valve fly out in an uncontrolled manner. (A) Signup and view all the answers

What should be followed when removing oil pressure control valves?

Follow the procedure in the service manual and use the appropriate tools and caging devices. (D) Signup and view all the answers

What is the purpose of pressure testing an oil cooler?

To ensure fluid does not pass between oil and coolant sections (D) Signup and view all the answers

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

To prevent damage to the oil pan or gasket surfaces (C) Signup and view all the answers

Where are some oil pumps located in an engine?

Behind the front pulley and driven by the crankshaft (C) Signup and view all the answers

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

Disconnecting the oil temperature and level indicator sending units (D) Signup and view all the answers

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

Pressure relief valve assembly and gears (C) Signup and view all the answers

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

To detect signs of air bubbles indicating a leak (A) Signup and view all the answers

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

Suitability of the pump for rebuilding or replacement (D) Signup and view all the answers

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

To prevent dropping the pan on the shop floor and damaging it or gasket surfaces (B) Signup and view all the answers

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

A leaking condition between different sections of the cooler (C) Signup and view all the answers

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

To prevent dirt and debris from entering sensitive pump components during inspection (D) 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?

All of the above. (D) Signup and view all the answers

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

To identify problems that may be due to poor lubrication and/or unusual operating conditions. (D) 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?

Presence of oil and fuel residue on the exhaust pipe. (A) Signup and view all the answers

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

Sight, touch, and smell. (C) Signup and view all the answers

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

To maintain optimal engine performance. (A) 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?

Ability to quickly identify and address changes in engine operation. (B) Signup and view all the answers

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

Using the results of an oil analysis program (A) Signup and view all the answers

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

Different gauges may provide conflicting readings (A) Signup and view all the answers

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

To ensure a more accurate reading (B) Signup and view all the answers

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

To maintain consistency in pressure testing (A) Signup and view all the answers

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

Use a mechanical pressure gauge designed for this purpose (C) Signup and view all the answers

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

To ensure maximum oil use and engine protection (D) Signup and view all the answers

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

Inaccurate test results over time (A) Signup and view all the answers

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

After obtaining the first pressure reading with a high-pressure gauge (A) Signup and view all the answers