Exam 11: Lower End Theory and Service

The holes in the cylinder block that allow the removal of sand used in the casing process are sealed by ____________________.

Technician A says a piston pin is sometimes called a wrist pin. Technician B says the piston pin is always centered in the piston. Who is correct?

Timing belts are only used on OHC engines.

Plastigage is used to check the clearance between _____.

Old core and oil galley plugs are normally removed and replaced as part of cylinder block reconditioning.

Babbitt, a mixture of lead and tin, is used in _____.

How is deck warpage checked?

When cylinder surfaces are badly worn or excessively scored or tapered, a(n) ____________________ bar is used to cut the cylinders for oversize pistons or sleeves.

Technician A says the distance across the outside parting surface of the bearing is slightly greater than the diameter of the housing bore, and this feature is called spread. Technician B says when a connecting bearing half is installed, the bearing edges extend slightly from the seat; this extension is called bearing crush. Who is correct?

When installing a segmented oil control ring, the end gaps of the three pieces must line up.

What is the function of the flywheel?

Maximum taper for a rod journal is typically ____________________ in. (____________________ mm).

Timing chain tensioners are spring loaded or ____________________ operated.

What is the function of compression rings?

The lobes of a camshaft designed for use with flat bottom lifters are slightly tapered. The taper cause the lifter to rotate in its bore.

Describe how to use Plastigage.

Two technicians are discussing the installation of segmented [three piece] oil control rings. Technician A says the ends of the expander/spacer [middle piece] must overlap. Technician B says that the end gaps of all three pieces must be evenly spaced apart. Who is correct?

A main or rod bearing insert that is an oversize bearing is thicker than the original bearing.

Which of the following is NOT a type of camshaft drive mechanism?

A full floating piston pin _____.