06 PP T235 Cooling
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Transcript of 06 PP T235 Cooling
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Purpose of theCooling system
Control temperature ofhot combustion.
4000 degree temps. couldseriously damage engineparts.
Provide Heat for passengerCompartment
Cool Trans fluid & Oil Heat moves from warm to
cold
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Cooling System TypesAir Cooling
Oil CoolingLiquid or
Water Cooled
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Cooling System Parts
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Water Jackets Surrounds thecylinders with waterpassage.
Absorbs heat fromthe cylinder wall.
Pump move water to
radiator where heatis exchanged to theair.
http://www.howstuffworks.com/cooling-system2.htmhttp://www.howstuffworks.com/cooling-system2.htm -
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Water Pump Non-positive
displacement pump
which circulatescoolant around coolingsystem.
Simple impeller design.
Usually driven by drivebelt from crankshaft.
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Water Pump Leakage
Weep hole
Noise
bearing
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Radiators
A radiator is a heatexchanger.
Tube and fin stylethe most popular.
Made of copper andbrass or aluminum
and plastic. 3 (radiator,
evaporator, heatercore)
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Radiator Types Two types of
radiatorconstruction.
Down-flow older
Cross-flow Aerodynamic
Lower hoodlines
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Radiator Fans Keeps air moving
through the radiatorwhen the car is notmoving.
Several types:
rigid,
flex (not used much
anymore), viscous clutch and
electric.
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Thermostat
Controls coolanttemperature.
Uses a temperature
sensor and a valve. Usually opens around
195 degrees F.
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Thermostat Failure If it fails in the open
position engine runs cold.
No heat, poor gas mileage,gunks up motor oil andengine insides.
If it fails closed: look out!
It creates pressure in theengine well beyond normallimits. Many types ofdamage may occur.
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Radiator Cap The cap allows access to
the cooling system forfilling and testing.
The cap has two valves: apressure relief valve set ataround 15 PSI and avacuum valve which isneeded when the engine
cools down.
Raises boiling point offluid
Able to take on more heat
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Coolant Recovery Tank Keeps the coolant level full in
the system at all times.
Works in conjunction with the
radiator cap. When the engine heats up the
coolant expands and flows tothe recovery tank.
When the engine coolant the
coolant contracts and creates avacuum and draws the fluid
back into the radiator.
Reduces air in system
Reduces rust
Less need to open radiator
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Coolant Temperature Sensor (CTS) Reports to computer
Gauges
Location
Block
Head
Radiator tank
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Fan Shroud
Causes the air to be
channeled through theradiator. Making the
radiator more efficient.
Also provides safety from
the spinning fan blades.
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Heater The hot water in the
cooling system is used
warm the passengercompartment.
A small radiator called a
heater core is located in
the dash area.
Heater hoses direct the hot
water to and from it.
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Heating System
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Coolant Several types of anti-
freeze available.
Ethylene glycol mostcommon. (its green)
Dexcool (its orange
and lasts 5 years) Propylene glycol (non-
toxic)
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Coolant 50/50 mix
Freeze protection -84 F
Overheat protection 276 F
Corrosion
PH test 9.810.5
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Radiator Hoses & Heater Hoses The upper and lower radiator hoses
direct the fluid from the engine to theradiator and back.
Radiator hoses are a special part foreach car.
Radiator
Heater
Bypass
Heater hoses do the same for theheater core.
Heater hoses are generic and come in,5/8, and diameter sizes.
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Drive Belts V-Belts
Serpentine Belts
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Alternative uses Cool oil
Cool transmission fluid
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Cooling System Service System inspection
Winterization
Cooling systemflushing
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Cooling System Inspection Check coolant level.
Check anti-freeze
protection. Check coolant
condition.
Check coolant pH. Leak check system.
Check radiator cap.
Check belt tension.
Check belt condition.
Check hose condition.
Blow out radiator fins.
Check thermostat.
Check radiator fan. Check water pump.
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WinterizeTerm used by repair industry. It usually
means a cooling inspection plus a coolant
flush.
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Cooling System Flushing Manual drain and refill. Flushing using the
Flush and Fillmachine.
Flush & Fill w/ Tee
Recycling coolant.
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Replacing a Water Pump Drain cooling system
Remove hoses
Remove pump & GASKET
Install new pump and gasket
attach hoses and belts
Refill and check system