Diesel ase study guides

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The light vehicle diesel engine area involves the following diagnosis components:. Which diagnostic tool connects to the Data Link Connector and allows the technician to read light duty diesel engine diagnostic trouble codes? An orange colored liquid is found under the front of the engine, which of the following fluids is leaking? Two technicians are discussing engine valve seals.

Technician A says to apply a light coat of engine oil to new oil seals and push them in. Technician B says you can install the intake oil seal into the exhaust side or install the exhaust oil seal into the intake side because they are interchangeable.

Who is right? When measuring a cylinder for taper wear, which of the following is the MOST likely place for wear? Technician A says a weak solution of antifreeze may cause corrosion build-up in the cooling system. Technician B says engine coolants and rust inhibitors last the lifetime of the diesel engine. For this question, look for the choice that would NOT fit the described situation. Read the entire question carefully before choosing your answer. A light duty diesel engine has a sever oil leak at the rocker cover.

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The technician has replaced the rocker cover gasket but the gasket still leaks. Which of the following is the MOST likely cause? A diesel engine with an electronically managed solenoid pump and nozzles has an active diagnostic trouble code for a single cylinder 3 misfire with a rough idle at operating temperature. Which of the following actions could cause the problem?

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Kershaw was among the first to receive ASE certification in For the complete practice test, flash cards, exam review and testing tips, check out Tests. View Answers as You Go. Incorrect answer.

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Please choose another answer. Coolant is orange, pink or green. Engine oil is yellow or brown. ATF is red. Washer fluid is blue. Tech A is right because you need to apply a light coat of engine oil to new oil seals to help ease them in. Tech B is wrong because installing the intake oil seal into the exhaust side or installing the exhaust oil seal into the intake side can cause problems later because the exhaust side is generally hotter than the intake side and the seals are generally different and made of different material and therefore not interchangeable.

Valve adjustment is necessary following the replacement of any valve train or cylinder head. Spraying the block with a rust inhibiter and wrapping the engine with a plastic bag keeps the engine free from corrosion until you are ready to assemble it. The other chemicals are not as effective. Study Online Instantly. The top of the cylinder is where the maximum temperature is found. Tech A is right because a weak solution of antifreeze may cause corrosion Diesel ase study guides in the cooling system.

Tech B is wrong because most original equipment manufacturers OEM recommend that the coolant be changed at specified intervals due to a loss in corrosion inhibitor life. The oil pump will slow down not speed up when an oil filter becomes clogged. A, b and c will occur when an oil filter becomes clogged. Diesel ase study guides is the MOST likely cause of the 4 choices.

The CDR crankcase depression regulator is deed to depress or reduce the crankcase pressure. If it is stuck closed, the pressure in the crankcase increases and pushes the oil out. Ash is mostly material left over after oil is burned in the combustion chamber.

Ash must be physically removed from a DPF since it cannot be regenerated. The other choices do not apply to a DPF. A short or long replacement line that is different than the original will change the timing in the 3 cylinder and cause a rough idle or misfire. B is wrong because a glow plug failure does not cause a misfire or rough idle on an engine when hot. C is wrong because a glow plug failure does not cause a misfire or rough idle on an engine when hot. D is wrong because high Cetane fuel does not cause a misfire.

High Cetane s indicate good ignition quality resulting in a short delay period and low Cetane s indicate poor ignition quality that in a long delay period. Low Cetane s can cause a long ignition delay, which can cause a hard starting with white smoke and misfiring cylinders. The intake pipe of the high pressure pump is where the pump will have lowest pressure. A is wrong because positive pressure would be present at the outlet pipe.

B is wrong because positive pressure would be present at the inlet of the secondary air filter. D is wrong because positive pressure would be present at the inlet side of the primary filter. Prev Next Finish. Quality starts with who wrote the material. Our practice exam writer s. Written by: Dr. Bookmark. General Diagnosis. DMM Digital Multimeter. Diagnostic Scan Tool. Laptop computer with interface.

Both b and c. Engine Oil. Washer Fluid. A only. B only. Both A and B. Neither A nor B. Valve adjustment is necessary following the replacement of a:. Cylinder head. Engine Block Diagnosis and Repair. After cleaning a diesel block and crankshaft, what chemical should they be sprayed with? Rust inhibitor. Engine oil. Anti-seize compound. Assembly lube.

Middle of cylinder. Bottom of cylinder. At a right angle to top. Top of cylinder. Lubrication and Cooling Systems Diagnosis and Repair.

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