Cooling system. Cooling System Components  Antifreeze/coolant  Thermostat  Water pump  Radiator  Radiator pressure cap  Expansion tank Hoses Water.

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Presentation transcript:

Cooling system

Cooling System Components  Antifreeze/coolant  Thermostat  Water pump  Radiator  Radiator pressure cap  Expansion tank Hoses Water outlet Water jackets Cooling fans Temperature indicators

Cooling System Components (Cont’d)

50/50

Premixed coolant

Cooling System Service  Pressure test the system for leaks.  Check coolant condition and strength using a hydrometer.  Check radiator cap for proper pressure.  Test thermostat for proper opening and closing temperatures.

Cooling System Service (Cont’d)  Check hoses for leaks and swelling.  Check the system with a voltmeter for electrochemical degradation.  Check water pump for bearing failure and leaks.  Check cooling fans and fan clutch for proper operation.

Common Causes of Water Pump Bearing Failure  A bent fan  A missing piece of fan blade  A cracked fan blade  Fan mounting surfaces that are not flush  A worn fan clutch

Water Pump

Fan

Clutch fan  Filled with a silicone fluid  Some have a thermostatic spring on the front of the clutch that is temp sensitive.  Visual and physical inspection.

Basic tests  The basic procedure for testing a vehicle’s cooling system includes inspecting components and testing for external and internal leaks.  Belt problems are easily discovered by visual inspection or by the sound of slippage.

Quick fix ?  To stop leak or not to stop leak. That is the question.  What else could go wrong here?

Thermostat Design

Radiator Cap

Hose Clamps  Worm gear clamp  Screw tower clamp  Spring clamp  Twin wire clamp  Rolled edge clamp  Heat shrink clamp

Don't Get Hosed!

Check the Belt

Smooth to Smooth Groove to Groove