vibration damper construction

Question 1

define harmonic vibration

Answer 1

its a high frequency movement sefulting from twisting and un twisting of the crankshaft

Question 2

what can happen if harmonic vibration is not controlled in an automotive engine?

Answer 2

it can flex or bend the crankshaft

Question 3

what device controls harmonic vibration?

Answer 3

vibration damper or harmonic balancer

Question 4

identify the parts of the vibration damper illistrated below

Answer 4

a- inertia ring
b- rubber ring
c- sleeve
d- crankshaft pulley

Question 5

the crankshaft —— operates belts for the alternator, water pump, air conditioning compressor and other units

Answer 5

pulley

Question 6

what is the function of the camshaft drive?

Answer 6

transfers the rotational motion of the crankshaft to the camshaft

Question 7

an —– cam drive is commonly used for heavy duty applications, such as taxicabs or trucks

Answer 7

timing gear

Question 8

define cam drive timing marks

Answer 8

they show technitians how to install the gears properly

Question 9

what is the common type of camshaft drive arrangment used on cam-in-block engines?

Answer 9

a timing chain and sprockets

Question 10

—- occurs when the timing chain flaps back and forth because of excessive slack in the chain

Answer 10

chain slap

Question 11

an —– may be used to take up the slack in the chain as it and the sprockets wear

Answer 11

chain tensioner

Question 12

what is the purpose of an auxiliary chain?

Answer 12

may be used to drive the engine oil pump

Question 13

describe the function of an engine front cover

Answer 13

encloses the timing chain or gear mechnisim and prevents oil leakage from the front of the engine

Question 14

an engine front cover bolts to the——

Answer 14

front of the engine

Question 15

an —– prevents oil leakage between the crankshaft and the front cover

Answer 15

front oil seal

Question 16

explain the function of an engines front end slinger

Answer 16

lubricates the timing mechinism and blocks the oil from striking the front seal, preventing leakage

Question 17

what basic componets make up a timing belt drive mechinism

Answer 17

consists of a crankshaft sprocket, camshaft sprocket, timing belt and a belt tensioner

Question 18

an —- provides a very smooth and accurate method of turning the camshaft

Answer 18

timing belt

Question 19

a —- is a spring-loaded wheel that keeps the timing belt firmly seated on its sprockets

Answer 19

belt tensioner

Question 20

a timing belt may also be used to drive the —

Answer 20

a- diseal pump injection
b- water pump
c- oil pump
d- all of the above

Question 21

describe the functin of a timing belt cover

Answer 21

simply protects the belt from damage and the techniian from injury

Question 22

what is a timing belt cover usually made out of

Answer 22

sheet metal or plastic

Question 23

true or false?: a timing belt cover serves the same function as an engine front cover

Answer 23

false