Question 1

What keeps the cylinder head and block aligned before the head bolts are torqued?

Accepted Answer

A) head gasket 
B) friction between head gasket and block 
C) gravity 
D) dowel pins

Question 2

The shop manual should have a picture of the head bolt tightening sequence. However, if there is no shop manual or technical data available, what would the best tightening sequence be?

Accepted Answer

A) Go from left to right all of the top row (intake side)first, then tighten all of the bottom row (exhaust)bolts right to left 
B) Go from left to right all of the bottom row bolts (exhaust side)first, then tighten all of the top row (intake)bolts right to left 
C) Go in a circular pattern beginning in the center and ending on the outboard ends 
D) Go in a circular pattern working from the outside toward the center

Question 3

Technician A says some seals are designed to keep oil from escaping around a rotating shaft. Technician B says some seals are used to prevent fluid leaks between two fairly rigid flanges. Who is correct?

Accepted Answer

A) A only 
B) B only 
C) both A and B 
D) neither A nor B

Question 4

Technician A says cork gaskets are used on most modern engines for valve cover and oil pan gaskets. Technician B says cork gaskets will weep some of the fluid they are sealing. Who is correct?

Accepted Answer

A) A only 
B) B only 
C) both A and B 
D) neither A nor B

Question 5

Molded rubber gaskets should be coated with hardening-type sealer prior to installation.

Accepted Answer

A) True 
 B)False

Question 6

After the break-in period, the cylinder head and intake manifold bolts may need to be retorqued.

Accepted Answer

A) True 
 B)False

Question 7

After the combustion of the air/fuel mixture, the inner edges of the cylinder head gasket are exposed to approximately ____________________ psi (____________________ kPa)of pressure.

Accepted Answer

The answer of After the combustion of the air/fuel mixture,...

Question 8

Two technicians are discussing gasket installation. Technician A says if a sealant is applied to a gasket designed to be installed dry, the gasket may leak. Technician B says if a sealant is required, it will be included in the box with the gasket. Who is correct?

Accepted Answer

A) A only 
B) B only 
C) both A and B 
D) neither A nor B

Question 9

The proper engine break-in procedure is a test run at ______.

Accepted Answer

A) constant 30 mph (48 km/h) 
B) 10 mph (16 km/h)and acceleration to 30 mph (48 km/h) 
C) constant 60 mph (96 km/h)highway speed 
D) 30 mph (48 km/h)and acceleration to 50 mph (80 km/h)

Question 10

Technician A says gaskets made of paper, fiber, and cork are called soft-cut gaskets. Technician B sometimes reuses old gaskets. Who is correct?

Accepted Answer

A) A only 
B) B only 
C) both A and B 
D) neither A nor B

Question 11

Proper engine break-in procedure is being discussed. Technician A says the engine should run at idle speed for at least two hours. Technician B says the engine should be accelerated at full throttle from 30 mph to 50 mph (80 to 133 km/h). Who is correct?

Accepted Answer

A) A only 
B) B only 
C) both A and B 
D) neither A nor B

Question 12

When lubrication of a fastener is recommended prior to installation, ______.

Accepted Answer

A) add the lubricant to the bolt hole 
B) apply the lubricant to the bolt threads 
C) Both A and B 
D) Neither A nor B

Question 13

What happens when a torque-to-yield bolt is replaced with a new bolt of identical grade but torqued to the value found in a regular torque table?

Accepted Answer

The answer of What happens when a torque-to-yield bolt is...

Question 14

Tightening of a bolt should be done with an impact wrench followed by a torque wrench.

Accepted Answer

A) True 
 B)False

Question 15

Using a ____________________ is the best method of prelubricating most modern engines

Accepted Answer

The answer of Using a ____________________ is the best method...

Question 16

Describe how the rocker arms are adjusted on OHV engines with hydraulic lifters.

Accepted Answer

The answer of Describe how the rocker arms are adjusted...

Question 17

Technician A says aluminum expands at a different rate than cast iron. Technician B says cast iron has a coefficient of thermal expansion two or three times greater than aluminum. Who is correct?

Accepted Answer

A) A only 
B) B only 
C) both A and B 
D) neither A nor B

Question 18

Technician A coats head gaskets with black RTV. Technician B coats exhaust manifold gaskets with red RTV. Who is correct?

Accepted Answer

A) A only 
B) B only 
C) both A and B 
D) neither A nor B

Question 19

What should be done to correct bolt holes in the block that are pulled up (raised)?

Accepted Answer

A) The threads should be cleaned with a bottoming tap 
B) The bolt holes should be tapered at the surface by chamfering 
C) The threads should be cleaned with a bottoming tap and the bolt holes should be tapered at the surface by chamfering. 
D) None of the answers is correct.

Question 20

Technician A says damaged threads in a cylinder head can be repaired with a helically coiled insert. Technician B says stripped threads are commonly caused by overtorquing. Who is correct?

Accepted Answer

A) A only 
B) B only 
C) both A and B 
D) neither A nor B

Exam 13: Engine Sealing and Reassembly

What keeps the cylinder head and block aligned before the head bolts are torqued?

The shop manual should have a picture of the head bolt tightening sequence. However, if there is no shop manual or technical data available, what would the best tightening sequence be?

Technician A says some seals are designed to keep oil from escaping around a rotating shaft. Technician B says some seals are used to prevent fluid leaks between two fairly rigid flanges. Who is correct?

Technician A says cork gaskets are used on most modern engines for valve cover and oil pan gaskets. Technician B says cork gaskets will weep some of the fluid they are sealing. Who is correct?

Molded rubber gaskets should be coated with hardening-type sealer prior to installation.

After the break-in period, the cylinder head and intake manifold bolts may need to be retorqued.

After the combustion of the air/fuel mixture, the inner edges of the cylinder head gasket are exposed to approximately psi ( kPa)of pressure.

Two technicians are discussing gasket installation. Technician A says if a sealant is applied to a gasket designed to be installed dry, the gasket may leak. Technician B says if a sealant is required, it will be included in the box with the gasket. Who is correct?

The proper engine break-in procedure is a test run at ______.

Technician A says gaskets made of paper, fiber, and cork are called soft-cut gaskets. Technician B sometimes reuses old gaskets. Who is correct?

Proper engine break-in procedure is being discussed. Technician A says the engine should run at idle speed for at least two hours. Technician B says the engine should be accelerated at full throttle from 30 mph to 50 mph (80 to 133 km/h) . Who is correct?

When lubrication of a fastener is recommended prior to installation, ______.

What happens when a torque-to-yield bolt is replaced with a new bolt of identical grade but torqued to the value found in a regular torque table?

Tightening of a bolt should be done with an impact wrench followed by a torque wrench.

Using a ____________________ is the best method of prelubricating most modern engines

Describe how the rocker arms are adjusted on OHV engines with hydraulic lifters.

Technician A says aluminum expands at a different rate than cast iron. Technician B says cast iron has a coefficient of thermal expansion two or three times greater than aluminum. Who is correct?

Technician A coats head gaskets with black RTV. Technician B coats exhaust manifold gaskets with red RTV. Who is correct?

What should be done to correct bolt holes in the block that are pulled up (raised) ?

Technician A says damaged threads in a cylinder head can be repaired with a helically coiled insert. Technician B says stripped threads are commonly caused by overtorquing. Who is correct?