This document provides an overview of cooling and lubrication systems. It begins by discussing oil pumps, including rotor and gear types. It then covers cooling systems and components like radiators, coolant mixtures, radiator caps, radiator hoses, hose clamps, thermostats, fans, fan clutches, and electric cooling fans. Common failures are listed, along with diagnostic aids. Scenarios of customer complaints are presented to illustrate potential issues. Review questions are provided at the end to test understanding.

1. Cooling & LubricationCooling & Lubrication
Chapter Review

2. MARCH-
Cooling & LubricationCooling & Lubrication
Chapter review
Image viewing
Interactive questions
Closing

3. MARCH-
Oil PumpsOil 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. MARCH-
Oil PumpsOil 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. MARCH-
Cooling SystemsCooling Systems
 1. What are 2 types of
cooling systems?
 2. What are the 9 items
listed in the diagram?
1. Air - Liquid

6. MARCH-
Cooling SystemsCooling Systems
 One at a time, identify 1
component & a brief
description of its purpose.

7. MARCH-
CoolantCoolant
 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. MARCH-
Radiator CapsRadiator 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. MARCH-
Radiator CapsRadiator 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
2. 14-17 PSI
3. Visual/Pressure test

10. MARCH-
Radiator HosesRadiator 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. MARCH-
Hose ClampsHose 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. MARCH-
ThermostatsThermostats
 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. MARCH-
Fans & Fan ClutchesFans & 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. MARCH-
Electric Cooling FansElectric 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. MARCH-
Service & RepairService & Repair
 Oil pressure sending units
 External leaks
 Corrosion
 Belts
 Component failure
 Fluid breakdown – lack of
maintenance
 Adjustments
 Electrolysis
Common Failures

16. MARCH-
Diagnostic AidsDiagnostic Aids
 Oil pressure gauges
 Black light & dyes
 Pressure testers
 Thermometers – infrared
 Tension gauges
 DVOM
 Scanners
 Refractometer
 PH testers

17. MARCH-
ScenariosScenarios
 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 won’t stop running.
Lets try a few examples of complaints that you will see.
What would you do if:

18. MARCH-
Review QuestionsReview 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. MARCH-
The EndThe End