ASE A1 Engine Repair Copy

A compression test shows that one cylinder is too low. A leakage test on that cylinder shows that there is too much leakage. During the test, air could be heard coming from the tail pipe. Which of these could be the cause?

An engine miss is being diagonsed using a culinder leakage test.Technician A says that any clinder with over 20 percent leakage has excessiv leakage. Technician B says that air leaking from the tailpipe indicates a cracked cylincer head. Who is right?

The customer complains that the engine cranks but does not start; the first thing to check should be:

on an overhead cam (OHC) engine with removable bearing caps, which of the following is used is measure bearing alignment?

Technician A says that some head bolts stretch permanently when they are tight-ened. technician B says some head bolts cannot be reused. who is right?

A vehicle has heavy white smoke emitting from its tailpipe at all engine speeds. The cause of this problem is

A squeal is heard in the front of a supercharged V6 engine. This squeal gets louder as the engine is accelerated. Which of these is causing this condition?

Loose fly wheel bolts _____.

While cleaning a pleated paper-type air filter element, the air gun should be held:

A broken valve spring will result in which of the following symptoms?

Which of the following creates a flapping sound near the front of the engine?

If the bell housing is not properly torqued to the engine block, ________.

Which of the following is the proper procedure for performing a cylinder balance test?

A compression test has been made on an in-line 4-cylinder engine. Cylinders 2 and 3 have readings of 10 psi. Cylinder 1 has a reading of 140 psi and cylinder 4 has a reading of 145 psi. Technician A says that these readings could be caused by a blown head gasket. Technician B says that these readings could be caused by wrong valve timing. Who is right?

All of the folowing statements regarding manifold heat control valves are true Except:

When removing the timing belt from an overhead cam engine, the techniciaan must first:

A new starter motor has been installed on an engine and the technician installed the original shim between the starter and the block. When the engine is crancked, a loud whining noise is herad. Technician A says that there is too little clearance between the starter pinion and the flywheel. Technician B says that there is too much clearance. who is right?

When checking connecting rods for damage and wear, which of the following is least likely to be checked?

A cylinder power balance test is being performed on a vehicle with sequential fuel injection. Two adjacent cylinders are under performing. Technician A says this could be due to a faulty head gasket. Technician B says this could be due to leaking secondary insulation. Who is correct?

Which of these is LEAST likely to cause low oil pressure in an engine.

A lifter with excessive leak-down will usually make a _____ noise.

A moderately loose alternator belt may cause:

An engine has been overheated until it quit running. What is the most likely result?

All of the following are reasons why you must disable the fuel injection system and ignition system when conducting an engine compression test, EXCEPT:

Cleaning chemicals are usually either a caustic material or an acid material. Which of the following statements is true?

Valve spring installed height is measured from?

The pressure and volume tests on a mechanical fuel pump are both below specs. Technician A says that an air leak in the fuel line between the tank and pump could be the cause. Technician B says that a plugged fuel tank pick up filter could be the cause. Who is right?

All of the following oil pump measurements should be performed with a feeler gauge Except:

Technician A says that a soft or gummy heater hose may be caused by a missing exhaust manifold heat shield. Technician B says that a brittle or hard lower radiator hose may be caused by engine oil leaking onto the hose. Who is right?

with engine at normal operating tempreature, the oil pressure test is usually performed at idle speed and a higher speed such as:

valve face and seat concentricity can be measured with all of the following except:

The torque converter of an automatic transmission is not engaging. This is resulting in poor fuel mileage. Technician A says the ECT sensor’s signal will affect TCC application. Technician B says the ECT sensor will affect the engine’s fuel mixture. Who is correct?

The top compression ring groove of piston is worn excessively and the gap is found to be larger than specifications. The technician would MOST likely:

When performing engine vacuum tests, which of the following indicates that the valve springs are weak?

When diagnosing a problem with the engine by listening, verify that the noise is actually coming from the engine. Which of the following methods is an acceptable practice that can be used to determine if a noise is coming from the engine or other components?

An engine oil cooler helps to prevent:

On most engines the clearance between the rod bearings and the crankshaft would be:

All of the following statements are correct when adjusting valve lash on engines with overhead camshaft cylinder heads, EXCEPT:

Pushrods should be checked for _

Which of the following tools will give the most accurate measurements when calculating valve guide wear?

The LEAST likely cause of a bent push rod is:

When measuring valve stem-to-guide clearance, Technician Asays the vave stems and guides should be measured at three vertical locations. Technician B says the valve guide diameter should be measured with either a hole or smap gauge. Who is right?

The hose from the positive crankcase ventilation (PVC) valve to the intake mani-fold is restricted. This problem could result in:

If either the radiator pressure cap sealing gasket or the radiator filler neck seat are damage, which of the folloing is LEAST likely to occur?

The areas around the mounting holes on a sheet metal rocker cover are dished from having the fasteners overtightened. To prevent oil leaks from occurring when the rocker cover is installed, the technician should:

A vehicle has a clogged catalytic converter. The LEAST likely cause of this is:

A strong sulfur smell is emitting from the tailpipe of a vehicle. The MOST likely cause of this condition is:

On a properly performing engine, the vacuum gauge reading should range from _____.

A zero compression reading in a cylinder during a cylinder compression test paired with excessive engine blowby indicates which of the following?

Technician A says metal burrs on the crankshaft flange may cause excessive wear on the ring gear and starter drive gear teeth. Technician B says metal burrs on the crankshaft flange may cause improper torque converter-to-transmission alignment. Who is right?

After an engine overhaul, the engine runs rough and lacks power. What is the most likely cause?

Which of the following steps is LEAST likely to be necessary when refilling a cooling system?

Which statement is true about surface finish?

A vacuum gauge is connected to an engine. The gauge reads 18 in-Hg at idle. When engine speed is increased, the gauge momentarily drops to near zero, then slowly rises and stabilizes at 9 in-Hg. The likely cause of these readings would be:

A bent connecting rod may cause:

Technician A says improper balance shaft timing causes severe engine vibrations. Technician B says the balance shafts are timed in relation to the camshaft. Who is right?

All lifters in an engine are cupped (concave). Technician A says replace the camshaft. Technician B says replace the lifters . who is right?

Most manufacturers recommend that piston diameter be measured at 90 degree to the wrist pin bore:

An engine suffers from detonation. Technician A this may be caused from a defective EGR valve. Technician B says advanced ignition timing can cause this condition. Who is correct?

Two technicians are discussing a ballooned oil filter. WhIch of these is causing this condition:

After performing cylinder power balance tests, which of the following can not typically be used to identify if a problem exists with the ignition system components?

Which of the following is indicated when all cylinders have an equal but significantly lower compression reading than specifications and the engine spins freely during cranking?

The LEAST likely place an RTV sealer would be used is the:

The harmonic balancer serves what function?

A technician is using a laptop computer and manufacturer software to test the ECT (Electronic Controlled Throttle) circuit that has a stored DTC P1121 (Electric Throttle Control Actuator). Which of the following customer concerns could be caused by a defective ECT return spring malfunction?

Coolant passages in the cylinder head should be inspected for _____________.

Which of the following methods is NOT used for detecting cracks in a cast-iron cylinder head?

while replacing a faulty heater core hose, a technician discovers that the hose is stubbornly stuck to the heater core fitting . To remove the hose, he should:

while adjusting mehanical valve lifters, Technician A says when the valve clearance is checked on a cylinder, the piston in that cylinder should be at top dead center (TDC) on the exhaust stroke. Technician B says some mechanical calce lifters have removable shim pads available in various thicknesses to provide the proper valve clearnce. who is right?

A heavey thumping noise occurs with the engine idling, but the oil pressure is normal. This noise may be caused by:

A defective water pump can be diagnosed by all of the following Except by:

on turbocharged engines, the lubricating oil is requently routed trough an external oil cooler. The cooler prevents the oil from getting hot enough to oxide and thicken, a process that begins when oil reaches a tempreature of:

The best tool for checking crankshaft end play is a:

A low compression reading on one or more cylinders during a cylinder compression test indicates which of the following?

A collapsed cooling system hose may be an indication of a:

Technician A says a clogged EGR port will cause detonation. Technician B says a clogged EGR port will not affect engine performance. Who is correct?

The ridge at the top of the cylinder ________.

A cylinder compression test reveals fairly even compression, but lower than specification. A second wet test results in higher readings on all cylinders. These results indicate:

Resurfacing an OHC cylinder head will?

After facing, valves must have a margin of at least?

while inspecting the intake manifold from a V-type engine, a technician notices a crack in the exhaust gas crossover passage on the underside of the manifold. the most likely cause of this condition is :

A high-pitched squealing noise is heard during hard acceleration. This noise may be caused by:

All of the following are reasons to replace a hydraulic valve lifter except:

Technician A says worn valve springs result in valve float at wide open throttle. Technician B says valve springs should be inspected for squareness with a square and a feeler gauge. Who is correct?

A small leak in the exhaust system could cause a _______ during a hard acceleration and a ______ during idle.

Reduced turbocharger boost pressure may be caused by a:

if the starter motor does not crank the engine, the first diagnostic step that the technician should perform is to :

The least likely cause of an oil saturated PCV filter is:

A vehicle briefly blows blue/gray smoke from the tailpipe when it’s first started in the morning. The MOST likely cause of this condition is:

Faulty camshaft bearings ____.

a technician is testing an upper radiator hose by squeezing it . the most likely cause of crackling or crunching noises would be:

An excessive sulfur smell in the exhaust of a vehicle with a catalytic converter can be an indication of:

A technician is checking for piston ring groove clearance. The proper technique includes.

Listening to the exhaust pulses at the tailpipe can also help diagnose engine problems. Puffing noises that occur erratically, without a specific interval, indicates _______.

all of the following could cause Air filters shoud be replaced:

when blowing out an air filter element , how far shoud the gun be from the inside of the element?

a technician is preparing to install new oil gallery plugs in a cylinder block, which of these operations is he least likely to perform?

The normal valve lash on engines with hydraulic lifters would be:

on some engines that use a timing chain hydrulic tensioner, chain stretch can be checked by:

the least likely cause of camshaft bind would be:

A technician has added fluorescent dye to an engine crankcase in order to locate an oil leak. The dye will glow when it is expose to: