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a vehicle is equipped with a coolant recovery system. coolant does not return to the radiator
when the engine cools.
A says that the transfer hose may be plugged.
B says that the filler neck soldered joint could be cracked
A
B
Both
Neither both
both a plugged transfer hose and a cracked filler neck soldered joint could prevent coolant from
returning to the radiator when the engine cools
a thermostat-testing setup is shown in the figure.
A says the thermostat will start to open when the water boils.
B says the thermostat valve should be fully open when the temp equals the rated temp
stamped on the thermostat
A
B
Both
Neither Neither
-the thermostat should be fully open long before the water starts to boil
,-the thermostat should start to open when the water temperature reaches its rated
temperature
serpentine belt stretch is indicated by:
using a belt tension gauge
belt deflection
a squealing noise at idle
using the scale on the tensioner housing using the scale on the tensioner housing
-a belt tensioner gauge is used to check tension on standard v-belts
-measuring belt deflection on a v-ribbed belt is not the best method
-a squealing noise at idle would indicate a loose or worn belt
A says that an engine oil cooler can be located inside one of the radiator tanks.
B says that an engine oil cooler can be mounted ahead of the radiator support
A
B
Both
Neither Both
,two common engine oil cooler mounting locations are: inside a radiator tank and ahead of the
radiator support
a tech is testing an upper radiator hose by squeezing it. the most likely cause of cracking or
crunching noises would be:
a corroded anti-collapse spring
low coolant level
a deteriorated hose inner liner
damage due to contact with power steering fluid a deteriorated hose inner liner
-an anti-collapse spring is found in the lower, not the upper radiator hose
-low coolant level will not cause this noise
-contact with power steering fluid causes a hose to become soft and gummy
A says that air trapped in the cooling system can cause overheating and a cracked cylinder
head.
B says on some engines you can unscrew the coolant temp sender to bleed the air out of the
system
A
B
Both
Neither Both
, air trapped in the cooling system can cause engine overheating and a cracked cylinder head.
also, on some engines, trapped air can be released by unscrewing the coolant temp sender.
a gear type oil pump is being cleaned and inspected.
A says that gear thickness and backlash are not usually measured; the gears and housing are
only inspected for scoring and damage.
B says that gear thickness and backlash should always be measured
A
B
Both
Neither A
gear thickness and backlash specs are rarely provided by mfrs. the gears and housing should be
inspected for scoring and other damage
A says that filling a vehicle's cooling system with pure coolant provides the maximum
protection against freezing.
B says that pure water absorbs heat better than pure coolant
A
B
Both
Neither B
the freezing point of a coolant/water mixture starts to increase when coolant is more than 70%
of the mixture