Exam 37: Engine Assembly and Dynamometer Testing

Main bearings and rod bearings should be checked for proper oil clearance by precision measuring the crankshaft journals and inside diameter of bearings, or by using which of these?

Technician A says that all oil galleries must be thoroughly cleaned before engine assembly can begin. Technician B says that all expansion cups and plugs should be installed with a sealer to prevent leaks. Who is right?

Service information states SAE 30 engine oil should be used on the threads of the head bolts, before installation and torquing. Technician A says that SAE 5W-30 will work. Technician B says that SAE that 10W-30 will work. Who is right?

The most common cause of premature bearing failure is ________.

Two technicians are discussing the torqueing procedure for head bolts. Technician A says that they should be tightened starting at the center of the head and working toward the ends. Technician B says that they should be tightened in three steps or according to the factory specified manner if torque-to-yield or torque-angle. Who is right?

Technician A says that studs should be installed finger tight. Technician B says that studs must be installed using a thread locker such as Locktite. Which technician is correct?

An engine dynamometer may use devices to convert pressure and temperature signals into electronic signals. These devices are called ________.

If the torque and horsepower readings are graphed, where do the curves cross (equal each other)?

The cylinder head bolts should be tightened (torqued) by which of these sequences?

Engine pre-oiling is recommended for which of these reasons?

Technician A says that the back of all engine bearings should be lubricated during assembly. Technician B says that the face of the main and rod bearings should be lubricated before final assembly. Who is right?

A coating often used to keep an engine from rusting during assembly is called ________.

An engine block is being fitted with studs. Technician A says that the tightening torque in the installation instructions is for the stud and not the nut. Technician B says that if a thread locker is used, be sure to immediately install the main bearing caps before the compound cures to help avoid misalignment. Who is right?