Chapter 11

Question 1

engine blocks material

Answer 1

iro, aluminium

Question 2

word cast refers to

Answer 2

how the block was made

Question 3

bore means?

Answer 3

drill or machine a hole

Question 4

cast iron holes can be checked by

Answer 4

magna fluxing

Question 5

aluminium blocks holes can be checked by

Answer 5

penetrant dye nd black light

Question 6

what is deck

Answer 6

top surface of the head

Question 7

cylinder taper measurements should not be exceeded than?

Answer 7

0.1524mm

Question 8

Out- of roundness shouldn’t exceed than?

Answer 8

0.381mm

Question 9

how to measure roundness

Answer 9

telescopic gauge

Question 10

criss- cross grooves in the cylinder (crosshatch) shouldn’t be more angular than?

Answer 10

20-60 degrees

Question 11

if the angle of crosshatch is too flat, what can it cause?

Answer 11

excessive oil consumption

Question 12

what is the thin residue on the cylinder walls due to heat and piston movement?

Answer 12

glaze

Question 13

How to deglaze the cylinder walls

Answer 13

by wiping down cylinders with alcohol or lacquer thinner

Question 14

what do techs use to deglaze cylinder walls?

Answer 14

ball hone

Question 15

what to use when honing the cylinders with hand

Answer 15

use drill to attach the honing tool

Question 16

after-deglazing and honing, how to clean the cylinders?

Answer 16

hot, soapy water, stiff bristle brushing lint- free cloth.

Question 17

what is camshaft duration

Answer 17

how long the cam holds the valves open in degrees.

Question 18

what increases the amount of valve openings

Answer 18

rocker arms

Question 19

what is valve overlap

Answer 19

both valves open slightly during intake and beginning of exhaust. for better fuel efficiency.

Question 20

what is the highest portion of one cam lobe

Answer 20

The nose (lifts)

Question 21

ramp/flank

Answer 21

side portions of the nose that slides the valves

Question 22

contact face of lifters should be which shape?

Answer 22

convex

Question 23

who made the first VVT

Answer 23

Daimler Chrystler

Question 24

what does hydraulic lifters do?

Answer 24

automatically compensates the effects of engine TEMPRATURE

Question 25

what does solid lifters do?

Answer 25

needs periodic adjustments, excessive clearance can cause clicking. has roller lifter

Question 26

what are the cam bearings made of?

Answer 26

Aluminium or steel with lining of BABBIT/tin

Question 27

best way of cleaning, blocks, cams and cranks

Answer 27

water and detergent, put oil immediately to avoid rust

Question 28

The maximum taper and out-of-roundness is

Answer 28

.254mm

Question 29

Bow of the crankshaft when measuring with dial indicator, should be___% of total indicator reading (TIR)

Answer 29

50%

Question 30

crankshaft bearing/inserts are of two type. one is split and other is?

Answer 30

Full round(one piece)

Question 31

what is thrust bearing

Answer 31

just crank bearing with flanges on the sides to bolt it down idk

Question 32

bearing spread

Answer 32

Bearing spread means that the distance across the bearing parting edges is slightly larger than the bearing bore.

Question 33

how to tell which size of crank bearing to use?

Answer 33

The manufacturer uses colour codes or stamped numbers to indicate which bearing size to use

Question 34

what his plastiguage used for?

Answer 34

For finding oil clearance between the bearing and the crankshaft

Question 35

what kind of gauge is used to check crankshaft end play

Answer 35

feeler gauge or with dial indicator.

Question 36

What is I-Beam of the piston

Answer 36

Push-rods provide max strength and minimum weight

Question 37

modern pistons are made of what

Answer 37

Aluminium alloy

Question 38

how to ensure that the pistons are being installed correctly?

Answer 38

Check the marks on top of the piston and the push. rod

Question 39

Excessive, irregular, or diagonal scuff marks on the piston indicate what?

Answer 39

lubrication, cooling system, or combustion problems.

Question 40

what are common compression rings made of?

Answer 40

cast iron, cast iron coated with moly, and cast iron coated with chrome.

Question 41

what kind of iron is used in rings for normal driving engines?

Answer 41

Cast iron offers a durable wear surface and is ideal for normal driving

Question 42

what kinda material is used in piston rings for high speeds and severe load conditions?

Answer 42

Moly or chrome-faced rings

Question 43

cam changes rotary motion into what

Answer 43

reciprocating motion

Question 44

The camshaft is driven by a crankshaft at ____its speed.

Answer 44

half

Question 45

most bearings used these days are what kind

Answer 45

Inserts bearings.

Question 46

other name of connecting rod journal.

Answer 46

Crank Pin