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Why pressure test the cooling system?
Check for leaks
The thermostat is an electronically controlled valve. True or False?
False
Cooling system capacity - 6.3 litres on a 50% mix. How much coolant to water is needed?
3.15 litres of each
What could a fallen core plug indicate?
Sign that the coolant has frozen
Why are radiator hoses made from rubber?
Flexibility and expansion
Some engines coat the inside of the cylinder head with this material as it is a poor conductor of heat
Ceramic
Used to test specific gravity of antifreeze
Hydrometer
What is a 'corrosion inhibitor'?
Additive
Main ingredient of antifreeze
Ethylene Glycol
2 main ingredients of coolant
Water and antifreeze
This component circulates coolant around the engine
Water Pump
Name of the component that blows warm air into the car
Heater Matrix
Another name for radiator
Heat Exchanger
Temperature controlled valve
Thermostat
This component increases the boiling temperature of the coolant b a further 25 dc
Pressure cap
This type of radiator offers better heat dissipation
Cross-flow
Tanks on the side
Cross-flow
Tanks on the top and bottom
Down flow
Which system can be described as a 'closed-loop system'?
Liquid Cooling
R.S
Rally Sport
Famous air-cooled car
Porsche Carrera 2.7 RS
2 types of cooling
Air and Liquid
Advantage of maintaining optimum engine running temperature
Burn and vapourise fuel deposits
Optimum engine running temperature
88-93 dc
Secondary function of the cooling system
Keep the engine running at a constant temperature
Main function of the cooling system
Prevent engine from over-heating
Temperature of the exhaust port
800 dc
Temperature of the inlet port
40-60 dc
Temperature of the swept combustion area
1200 dc
Temperature of the unswept combustion area
2000 dc
Term given to fuel/air mixture igniting before sparking from the spark plug
Pre-ignition
Effect of 'red heat' on oil
Cause it to burn
Term used to describe the effect of super hot exhaust gasses on metals
Red heat
Percentage of the heat that gets transferred into kinetic energy
33%


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