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Cooling

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1. What are we looking at in this picture? 2. What type of oil pump is this? ... Refractometer. PH testers. MARCH-2004. Scenarios. Customer complained of no heat. ... – PowerPoint PPT presentation

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Title: Cooling


1
Cooling Lubrication
  • Chapter Review

2
Cooling Lubrication
  • Chapter review
  • Image viewing
  • Interactive questions
  • Closing

3
Oil Pumps
  • 1. What are we looking at in this picture?
  • 2. What type of oil pump is this?
  • 3. What is the maximum generic tolerance
    measurement between the gears?

1. Oil Pump
2. Gear
3. .005
4
Oil Pumps
  • 1. What are we looking at in this picture?
  • 2. What type of oil pump is this?
  • 3. What type of displacement is this pump?

1. Oil Pump
2. Rotor
3. Positive
5
Cooling Systems
  • 1. What are 2 types of cooling systems?
  • 2. What are the 9 items listed in the diagram?

1. Air - Liquid
6
Cooling Systems
  • One at a time, identify 1 component a brief
    description of its purpose.

7
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. 67/33
2. 212º F
3. 235º
8
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
2. 1.8ºC or 3.2ºF
9
Radiator Caps
  • 1. How many types of radiator caps are there?
  • 2. What is the average pressure rating of todays
    caps?
  • 3. How do we test radiator caps?

1. 3 constant/vent/closed
2. 14-17 PSI
3. Visual/Pressure test
10
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
11
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
12
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.
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
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
Service Repair
Common Failures
  • Oil pressure sending units
  • External leaks
  • Corrosion
  • Belts
  • Component failure
  • Fluid breakdown lack of maintenance
  • Adjustments
  • Electrolysis

16
Diagnostic Aids
  • Oil pressure gauges
  • Black light dyes
  • Pressure testers
  • Thermometers infrared
  • Tension gauges
  • DVOM
  • Scanners
  • Refractometer
  • PH testers

17
Scenarios
Lets try a few examples of complaints that you
will see. What would you do if
  • Customer complained of no heat.
  • A vehicle was taking coolant.
  • Gauge always reads lower than normal.
  • Boils over during highway driving.
  • Customer wants vehicle winterized.
  • Electric fan wont stop running.

18
Review Questions
  • 1. Why would coolant read 1 volt on a DVOM?
  • 2. Why does a radiator hose show 12 volts on a
    DVOM
  • 3. Where on an engine is an oil pressure test
    performed?
  • 4. What would cause low oil pressure?
  • 5. What would cause excessive oil pressure?
  • 6. What is viscosity?
  • 7. What could be the problem if a cam seal
    continues to leak externally after several
    replacements and the shaft is not scorn?

19
The End
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