Exam 14: Lubricating and Cooling Systems

What are the component parts of a radiator?

During engine warm-up, when the thermostat is closed, _____.

A ____________________ system provides a continuous flow of fresh air through the crankcase to relieve pressure and prevent the formation of corrosive contaminants in the crankcase.

A voltmeter is used to check the cooling system for ____________________.

During routine service a small amount of engine oil is found in the air cleaner housing. Technician A says the PCV valve may be clogged. Technician B says the engine could be overfilled with oil. Who is correct?

If the fan shroud is removed from a vehicle, _____.

The radiator cap should be removed only when the engine is at full operating temperature.

If the engine overheats during long periods of idling but runs normally at highway speeds, the problem is most likely _____.

Water pump failure can be caused by a bent fan blade.

Special coolants are required on most hybrids as the coolant cools the engine and inverter assembly.

Normally 30 to 50 percent of the engine's coolant remains in the system after the radiator has been drained.

The ____________________ is used to measure the level of oil in the oil pan.

Technician A says high crankcase pressure can be caused by worn piston rings. Technician B says low crankcase pressure can be caused by a faulty PCV system. Who is correct?

The water pump on many late model engines is driven by the engine's timing belt or timing chain.

What is the function of a pressure relief valve in an oil pump?

Used coolant cannot be poured down the drain or into a sewer and must be reclaimed or recycled.

Which of the following tools can be used to test the operation of the thermostat without removing it from the engine?

Two technicians are discussing a car with a very noisy water pump. The pump makes a lot of noise but is not leaking coolant. Technician A says the owner can continue to drive the vehicle as long as there are no signs on coolant leakage. Technician B says the water pump must be replaced immediately. Who is correct?

Two technicians are discussing oil filters. Technician A says the oil filter has an anti-drain-back valve that prevents the oil in the filter and engine oil passages from returning to the sump when the engine is shut down. Technician B says the oil filter has a bypass valve that in the event the filter becomes plugged, oil can flow directly to the bearings. Who is correct?

Identify causes of water pump failure.