Q3. What are the two types of radiators?

Q4. Where is the vacuum valve located in the radiator cap?

Q5. What type of fan clutch uses a bimetal spring to control fan action?

Q6. What component of a liquid-cooled system senses engine temperature and controls coolant flow through the radiator?

Q7. When replacing antifreeze, what is the ideal mixture you recommend?

Q8. What are the three methods of flushing a liquid- cooled system?

Q9. What two devices am used to check antifreeze strength?

Q10. What device is used to perform a cooling system pressure test?

ENGINE LUBRICATING SYSTEMS

LEARNING OBJECTIVE: Identify types of lubricating (oil) systems. Point out their operational characteristics and maintenance requirements.

All internal combustion engines are equipped with an internal lubricating system (fig. 6-17). Without

Figure 6-17. - Typical engine lubrication system.