Answer A is correct. Use a machinist rule to measure valve tip installed height.
Answer B is wrong. Use a square and a feeler gauge to check valve spring squareness.
Answer C is wrong. Technician A is correct.
Answer D is wrong. Use a machinist rule to measure valve spring installed height.
Answer A is wrong. Both technicians are correct.
Answer B is wrong. Oil coolers can leak coolant or oil. Inspect the gasket and oil cooler o-ring for leaks.
Answer C is correct. When the engine is running hot, the oil is also running hot—too much heat results in thermal breakdown.
Answer D is wrong. Both technicians are correct.
Answer A is wrong. A clogged catalytic converter causes a restriction that results in a noticeable drop in power during acceleration.
Answer B is wrong. A clogged or faulty fuel injector will result in poor engine performance and misfire.
Answer C is wrong. A faulty outer CV-Joint makes a clicking or popping noise while slowly turning corners.
Answer D is correct. A worn or broken engine or transmission mount results in a noticeable vibration with the brake applied and the transmission placed into gear.
Answer A is wrong. The turbocharger wastegate controls the turbocharger's output. It opens to divert exhaust from the turbine wheel, depriving it of pressure.
Answer B is wrong. A vacuum leak in the intake manifold results in a lean air-fuel ratio.
Answer C is correct. A faulty boost sensor, a stuck closed wastegate, or a defective control valve solenoid cause excessive boost pressure. Without this necessary reduction in output, excessive manifold and cylinder pressures could damage vital engine components.
Answer D is wrong. Leaking turbocharger oil seals cause excessive oil consumption and blue-gray exhaust.
Answer A is wrong. Valve guides are small holes machined into a cylinder head that allow the intake and exhaust valves to move up and down. A misaligned valve or a faulty valve seat seal results in valve overheating.
Answer B is wrong. The valve guides in iron cylinder heads are machined directly into the head. Aluminum heads have valve guide inserts. The inserts are press-fit into slightly smaller holes. They use inserts because aluminum will wear and is not as strong as iron.
Answer C is correct. Both technicians are correct.
Answer D is wrong. Both technicians are correct.
It's important to start early, use the Internet, and practice time management. While some technicians can take all of these tests at once, they are few and far in between. It often makes sense to take them in pairs. For Example: Engine Repair and Engine Performance or Manual Drivetrain and Axles and Automatic Transmission. Sometimes you'll see the same type of questions on both tests. It's up to you, the test taker to make these decisions as only you know how much you can handle at this time. These tests have a different format than most and if each question is not read carefully, it's easy to make a mistake.
For more information about ASE, visit the official ASE website at www.ase.com
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