Deck 12: Engine Block Construction

Question 1

The harmonic balancer attaches to the rear of the crankshaft and is used to reduce vibrations.

Answer 1

False

Question 2

Technician A says that engine block cylinders are measured for taper. Technician B says that the piston rings typically cause the most wear in the middle of the cylinder. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Answer 2

A

Question 3

What tools would be used to measure crankshaft warpage?

A) straightedge and feeler gauge
B) dial caliper and V-blocks
C) dial indicator and V-blocks
D) dial bore gauge and outside micrometer

Answer 3

C

Question 4

Crankshaft journals are measured for all of the following EXCEPT ____.

A) taper
B) out-of-round
C) diameter
D) runout

Question 5

What does the process of line boring address?

A) cylinder imperfections
B) main bearing saddle problems
C) block deck sizing
D) lifter bore repair

Question 6

Scratches in the deck of the block deep enough to catch your finger nail should be resurfaced.

Question 7

Technician A says that when an engine block is bored, the original pistons must be replaced. Technician B says that a cylinder that is out-of-round may be repaired by boring. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 8

Freeze plugs are placed in the sides of the block to protect it during freezing conditions by popping out and preventing cracks.

Question 9

Cylinder taper is being discussed. Technician A says taper does not affect the ring gap as the piston goes up and down. Technician B says that up to.010" (.254mm) is usually an acceptable amount of taper. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 10

Technician A says that when one cylinder is bored oversized, the others in the block must be bored to match. Technician B says that if only one cylinder is damaged, sleeving may be a more cost effective repair. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 11

Most cylinder wear occurs in the middle of the cylinder.

Question 12

Technician A says that if one main bearing journal is ground to the next undersize, all of the other main bearing journals must be cut to match. Technician B says that if a main bearing journal is worn below the limits of machining, an alternative may be welding up the journal and then grinding it back down to its original size. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 13

Modular design refers to the ability of the production plant to build the same design engine in different configurations.

Question 14

On V-type engines, if one deck is resurfaced, the other side should also be done to match.

Question 15

Interference parts are different size components that are precision fit so that a puller or press is necessary to remove or install.

Question 16

Sleeves can be installed to repair a damaged bearing journal in an engine block.

Question 17

Main bearing bore alignment is measured with a dial indicator and a straightedge.

Question 18

A bedplate has all of the main caps cast as one unit.

Question 19

Technician A says that main bearing caps are interchangeable. Technician B says that main bearing bores are checked for alignment with a straightedge and feeler gauge. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 20

Technician A says that resurfacing the deck of a block is usually done in an automotive repair shop. Technician B says that sleeves are installed after the block deck is resurfaced. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 21

Technician A says that an even firing V8 engine has a power stroke start every 90 degrees of crankshaft rotation. Technician B says that a four-cylinder engine will start a power stroke every 180 degrees of rotation. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 22

What are the two methods of straightening a warped crankshaft?

Question 23

What does plateau honing do?

Question 24

TIR stands for:

A) Total Internal Radius
B) Total Indicated Radius
C) Total Indicated Runout
D) Total Internal Runout

Question 25

How many places should the main bearing bore be measured at to check for roundness?

Question 26

Technician A says that worn camshaft bearings cause low oil pressure. Technician B says that camshaft bearings installed in the engine block are pressed into place with a special tool. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 27

Where do flexplates usually crack?

Question 28

When removing the pistons and rods from the engine block, what needs to be done on some engines just prior to knocking them out to protect the crankshaft journals?

Question 29

Technician A says that when a long block is purchased, the old cylinder heads must be reused. Technician B says that a long block includes the cylinder heads, intake and exhaust manifolds. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 30

Which of the following can be caused by a separated harmonic balancer?

A) Engine failure
B) Vibration
C) Crankshaft damage
D) All of the above

Question 31

All of the following are crankshaft repairs EXCEPT ____.

A) crack welding
B) grinding
C) polishing
D) straightening

Question 32

All of the following are part of cylinder reconditioning EXCEPT ____.

A) resurfacing
B) boring
C) honing
D) sleeving

Question 33

What is the lower part of a two-piece engine block called?

Question 34

When installing a harmonic balancer, the hole in the balancer is smaller than the crankshaft so it must be put on by pressing it. What type of fit is this?

Question 35

Technician A says crankshafts can often be straightened if warped. Technician B says cracked crankshafts can be welded and reused. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 36

What are the four main purposes of line boring?

Question 37

In a typical four-cylinder engine, which cylinders are paired together by their position on the crankshaft?

A) 1 and 2, 3 and 4
B) 1 and 3. 2 and 4
C) 1 and 4, 2 and 3
D) None are paired

Question 38

What is the rule for crankshaft warpage limits if specifications are not available?

Question 39

Technician A says crankshafts in high performance engines are generally cast iron. Technician B says crankshafts in high performance engines may be forged iron. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 40

If a block has to be resurfaced on the deck beyond specifications, what two options are there?

Question 41

Describe how crankshaft warpage can be measured if V-blocks are not available.

Question 42

Why must a ridge at the top of the cylinders be removed for proper disassembly and reassembly?

Question 43

What are the steps involved in the use of a ridge remover tool?

Question 44

What are the steps taken when line boring?

Question 45

What is the area around the cylinders called that allows coolant to circulate through to remove heat?

Question 46

What is the reason for manufacturers to install core plugs into engine blocks?