201C - Engine Block & Cylinder Liner Service Flashcards

1
Q

Cast iron cylinder blocks can be placed in a high temperature oven for cleaning. What temperature should it be baked at?

A

Cast iron:
500F - 700F for 5-6 hours

Aluminum:
400F for 2 hours

201C pg. 5

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2
Q

What four methods can be used to check for cracks in a cylinder block?

A
  • Dye check
  • Magnetic Particle
  • Magnaflux
  • Pressure testing

201C pg. 7

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3
Q

How is a cylinder block pressure tested for cracks?

A

20-40 psi
200F (93C)
15 - 20 minutes

Plug ports and use dummy injectors

201C pg. 8

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4
Q

How is a cylinder block deck surface checked for flatness?

A

Straight edge and feeler blades
Minimum of 3 measurements must be taken.

Not to exceed 0.004”

201C pg. 10

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5
Q

What are main bearing bores measured for?

A
  • Max diameter
  • Out of round
  • Taper

Three measurements taken on either side of the bore, staying off the parting line during measurements.

Caps must be torqued to spec.

201C pg. 13

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6
Q

How should a cylinder block be stored?

A
  • Light coating of oil
  • Main bearing caps torqued to 1/2 spec.
  • Wrap in plastic
  • Store in clean, dry location

201C pg. 16

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7
Q

Where will the majority of cylinder wear occur?

A

90 degrees to the crankshaft centreline at the top of piston ring travel.

201C pg. 22

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8
Q

On a clockwise rotating engine, what sides of the cylinder will be the major and minor thrust sides?

A

Major Thrust Side - Right hand side
Minor Thrust Side - Left hand side
(As viewed from the rear of engine)

201C pg. 22

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9
Q

What is the purpose of a ridge reamer?

A

To remove the ridge at the top of ring travel created by wear.

Once ridge is removed, cylinders can be removed without damaging piston rings.

201C pg. 23

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10
Q

When machining cylinder bores, how is the necessary oversized dimension determined?

A

Double the taper wear and use the next largest piston size available.

201C pg. 26

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11
Q

What would be used to remove light scoring and small amounts of taper from a cylinder that is still within manufacture specifications?

A

Rigid hone

201C pg. 27

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12
Q

What is cylinder crosshatch?
What angles should it be at?

A

Angled pattern of microscopic grooves in the cylinder wall that retains oil for lubricating piston rings.

Angle can vary from 40-60 degrees

201C pg. 28

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13
Q

What tool would be used to de-glaze a cylinder wall?

A

Flexible hone / ball deglazer

201C pg. 28

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14
Q

After honing or deglazing, how should the cylinder bores be cleaned?

A

Wash with hot water, detergent, stiff bristle brush.

Do not use solvents.

201C pg. 29

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15
Q

Liner flange thicknesses should not vary by more than:

A

0.001”
Measured in 4 places, 90 degrees apart

201C pg. 36

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16
Q

Counterbore measurements should not vary by more than:

A

0.001”
Measured with a sled gauge at 4 places, 90 degrees apart.

201C pg. 37

17
Q

How can liner height be adjusted?

A

By machining down the counterbore or adding shims in the counterbore.

201C pg. 38

18
Q

Installed liner heights are generally not permitted to vary by more than _______ from liner to liner.

A

0.002” - 0.003”

201C pg. 41

19
Q

Cast iron and aluminum engine blocks can be placed in a high temperature oven for cleaning. What temperatures should they be baked at?

A

Cast iron:
500F - 700F for 5-6 hours

Aluminum:
400F for 2 hours

201C pg. 5