Volkswagen Polo Service & Repair Manual: Physical Principles
| The four known states of water also apply to air
conditioning system refrigerants. |
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| When water is heated in a vessel (heat absorption), water
vapor can be seen to rise. If the vapor is further heated
through heat absorption, the visible vapor turns into invisible
gas. The process is reversible. The warmth is extracted from
gaseous water, vapor forms first, then water and then ice. |
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Heat Transfer
| Every substance consists of a mass of moving molecules. The
fast moving molecules of a warmer substance give off some of
their energy to the cooler and thus slower molecules. As a
result, the molecular motion of the warmer substance slows down
and that of the colder substance is accelerated. This process
continues until the molecules of both substances are moving at
the same speed. They are then at the same temperature and no
further heat exchange takes place. |
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The boiling point given in tables for a liquid is always
referenced to an atmospheric pressure of 1 bar (14.5 psi). If
the pressure acting on a fluid changes, its boi ...
Other materials:
Test Requirements
Radiator and condenser are clean (clean if necessary).
The ribbed belt for the A/C compressor and alternator
tensioned correctly.
All air ducts, covers and seals are OK and installed
correctly.
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Sun visors
Fig. 70 Sun visor
First read and observe the introductory information
and safety warnings
Various positions for the driver and front passenger sun visors:
Folded down over the windscreen.
Pulled out of the bracket and swung over towards the door .
Vanity mirror light
There is a v ...
Tire Pressure Sensor and Metal Valve, Removing and Installing
Special tools and workshop equipment
required
Torque Wrench 1410 -VAG1410- and Torque Wrench 1331 5-50Nm
-VAG1331-
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Place metal valve with rubber seal through rim from inside.
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Pressure and Boiling Point