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The purpose of the exhaust manifold is to:
Collect the exhaust gas
When testing back pressure in an exhaust system, what would be the normal pressure reading for a good exhaust system with the engine operating at 1800 RPM?
1 psi
How would you determine if a catalytic converter is functioning correctly
Using a temperature gauge or instrument, the temperature at the outlet of the converter should be at least 38c (100F) greater than the temperature at the inlet of the converter
What is the main function of the cooling system
The main function of the cooling system is to regulate the engine temperature
What is the most common type of thermostat
Wax pellet
List the three types of cooling systems
Air cooled system
Liquid cooled open system
Liquid cooled closed system
What are two popular coolant products? Which is safer for the enviroment
Eythlene glycol
Propylene glycol
Propylene glycol is safer because it is not toxic or as hazardous on the environment
What is the function of the radiator cap?
The radiator caps purpose is to raise the pressure above atmospheric pressure in the cooling system. This increase in pressure raises the boiling point temperature of the coolant
Explain two possible results from a coolant leak into the engine and lubrication system
A) if coolant gets into a cylinder, a hydraulic lock could result and lead to catastrophic damage of the piston, connecting rod and cylinder head
B) if coolant mixes with the engine oil, bearings and components are damaged
List five functions of the lubrication system
Reduce friction
To cool
To seal
To clean
To absorb loads (quiets)
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