COOLING SYSTEM Teknik Kendaraan Ringan Semester 3th Class XI Kompetensi Kejuruan SK-KD 3 TH

DIAGRAM ALUR PENCAPAIAN KOMPETENSI

TEKNOLOGI DAN REKAYASA 3 1. Radiator 2. Resevoir tank 3. Radiator Cap 4. Cooling Fan 5. Water Pump 6. Thermostat What are cooling system parts ?

Cooling Systems 1. What are 2 types of cooling systems? 2. What are the 9 items listed in the diagram? 4 TEKNOLOGI DAN REKAYASA

Cooling Systems  One at a time, identify 1 component & a brief description of its purpose. 5 TEKNOLOGI DAN REKAYASA

Coolant  1. What is the ideal coolant mixture ratio?  2. What is the boiling point of water?  3. What is the boiling point of a 67/33 mix? 1. 67/ º F º 6 TEKNOLOGI DAN REKAYASA

Radiator Caps  1. What is the purpose of a radiator cap?  2. Every PSI of pressure = how much of an increase in the boiling point? 1. Increase boiling point – Refill reservoir ºC or 3.2ºF 7 TEKNOLOGI DAN REKAYASA

Radiator Caps  1. How many types of radiator caps are there?  2. What is the average pressure rating of today’s caps?  3. How do we test radiator caps? 1. 3 – constant/vent/closed PSI 3. Visual/Pressure test 8 TEKNOLOGI DAN REKAYASA

Radiator Hoses  1. What is the purpose of radiator hoses?  2. What element is used to make the hoses black?  3. Which hose is subject to the roughest service life? 1. Contain/Transport coolant 2. Carbon 3. Upper radiator hose 9 TEKNOLOGI DAN REKAYASA

Hose Clamps  1. How many types of hose clamps may we see?  2. What are the names of these hose clamps? 1. 5 Types 2. Screw Tower – Spring – Rolled Edge – Worm Gear – Twin wire 10 TEKNOLOGI DAN REKAYASA

Thermostats  1. What are 2 functions of a thermostat?  2. When must a thermostat begin to open?  3. When must the thermostat be “fully” open? 1. Control temperature & Flow 2. 3ºF above or below rating 3. 20ºF above “start to open”. 11 TEKNOLOGI DAN REKAYASA

BYPASS LESS TERMOSTAT TEKNOLOGI DAN REKAYASA 12 What are name Cooling system parts ? 1. Thermostat 2. Saluran Bypass 3. Radiator 4. Water Pump

THERMOSTAT WITH BYPASS TEKNOLOGI DAN REKAYASA 13

Fans & Fan Clutches  1. What 2 types of fans are shown?  2. Identify 2 types of downsides to these types of fans.  3. Why are fan shrouds used? 1. Flex - Clutch 2. Rob horsepower - Noisy 3. Efficiency –Engine placement 14 TEKNOLOGI DAN REKAYASA

November 7, 2000 Electric Cooling Fans  1. Why are electric fans used?  2. What components are needed to make this system work?  3. Do these fans run while driving? 1. Efficiency - Control 2. Sensor-Switches-Relays-Wiring-Fuse 3. Typically they shut down at 40km/hr & up. 15

TEKNOLOGI DAN REKAYASA 16 Bibliography: Toyota Technician, Toyota Astra Motor www. carrersnet.com

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