Exam 33: Pistons, Rings, and Connecting Rods

Some connecting rods have ________ to help lubricate the cylinder wall or piston pin.

Technician A says that the connecting rods should be marked before disassembly. Technician B says that pistons are cam ground so that when operating temperature is reached, the piston will have expanded enough across the piston pin area to become oval shaped. Who is right?

A misaligned connecting rod causes what type of engine wear?

A full-floating piston pin is held in place using ________.

All of the following are methods of piston to rod attachment EXCEPT ________.

Technician A says that if the ring end gap is excessive, blowby gases can travel past the rings and into the crankcase. Technician B says that piston rings usually include three compression rings at the top of the piston and an oil control ring below the compression rings. Who is right?

Many aluminum piston skirts are plated with ________.

Piston ring gap should only be measured after ________.

A hypereutectic piston ________.

Technician A says that chrome rings are the best rings to use in an unbored cylinder. Technician B says that ring end gap is non-adjustable; therefore there is no need to check it when reassembling the engine. Who is right?

In this drawing, which is the side clearance?

The space behind the piston ring is called ________.

Technician A says that replacement pistons can be of different weights from the original pistons. Technician B says that some engines use an offset piston pin to help reduce piston slap when the engine is cold. Who is right?

Full floating piston pins are retained by ________.

Which type of connecting rod needs to be heated to install the piston pin?

Technician A says that powdered metal connecting rods cannot be reconditioned and must be replaced if damaged or worn. Technician B says that the piston and the connecting rod must be correctly assembled according to identifying notches or marks. Who is right?

What is the technician doing in this photograph?

Side clearance is a measure taken between the ________ and the ________.

Cam ground pistons, as they warm up, take on which of these shapes?

A hypereutectic piston has a higher ________.