A vehicle has had several radiator replacements, and each time there has been pinhole leaks in the aluminum. Technician A states that the engine coolant may need to be exchanged more often. Technician B states that the engine grounds should be inspected closely since this could be the cause. Who is correct? Select one: a. Technician A only b. Technician B only c. Both Technicians A and B

A vehicle has had several radiator replacements, and each time there has been pinhole leaks in the aluminum. Technician A states that the engine coolant may need to be exchanged more often. Technician B states that the engine grounds should be inspected closely since this could be the cause. Who is correct? Select one: a. Technician A only b. Technician B only c. Both Technicians A and B

Automotive Technology

7th Edition

ISBN:9781337794213

Author:ERJAVEC, Jack.

Publisher:ERJAVEC, Jack.

Chapter14: Lubricating And Cooling Systems

Section: Chapter Questions

Problem 1ASRQ: An engine overheats in traffic but is fine when driving: Technician A says a faulty thermostat may...

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Which of the following is not an effective way to determine if an engine has an internal coolant leak? Performing a pressure test on the system Visually inspecting the exhaust, coolant, and engine oil Using a dye penetrant and black light Using a combustion leak tester
Which of the following statements about EVAP systems is not true? a. If the system is purging vapors from the charcoal canister when the engine is running at high speeds, rough engine operation will occur. b. Cracked hoses or a canister saturated with gasoline may allow gasoline vapors to escape to the atmosphere, resulting in gasoline odor in and around the vehicle. c. Rough idle, flooding, and other similar conditions can indicate a saturated canister. d. A vacuum leak in the system can cause starting and performance problems.
While discussing the results of an oil pressure test: Technician A says that when the fluid pressures are high, internal leaks, a clogged filter, low oil pump out put, or a faulty pressure regulator valve are indicated. Technician B says that if the fluid pressure increased at the wrong time, an internal leak at the servo or clutch seal is indicated. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor B
the oil pressure light stay on whatever the engine fis running, and the oil pressure has been checked and it meet specifications: Technician A says that a ground in the circuit between the indicator light and the pressure switch could be the cause. Technician B says that an open in the pressure switch could be the cause. Who is correct?
While discussing an inoperative blend air door: Technician A says that to check the proper functioning of the ductwork, a scan tool may be used to command the door to change position. Technician B says that in some cases you can reach under the dash to reconnect the cable or free a stuck flap. Who is right? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor B
When discussing the diagnosis of a positive back pressure EGR valve: Technician A says that with the engine running at idle speed, if a hand pump is used to supply vacuum to the EGR valve, the valve should open at 12 in. Hg of vacuum. Technician B says that with the engine not running, any vacuum supplied to the EGR valve should be bled off and the valves diaphragm should not move. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor B
Before replacing any exhaust system component: Technician A soaks all old connections with penetrating oil. Technician B checks the old systems routing for critical clearance points. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B
Technician A says an engine may use one or more valve springs per valve. Technician B says additional valve springs are used to control vibration and increase total pressure. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B
List five problems that can be caused by engine overheating.
While diagnosing an engine that overheats after frequent hard accelerations: Technician A checks for a collapsed lower radiator hose. Technician B checks the cooling fan electrical circuit. Who is correct? Technician A Technician B Both A and B Neither A nor B
An engine overheats in traffic but is fine when driving: Technician A says a faulty thermostat may be the cause. Technician B says the fan clutch could be the cause. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B
Subject:TLE (Sorry for the b&w pic...) Draw the "coolant temperature gauge" indicating the middle temperature of an engine.