Warm Your Engine Up– Oil must be warmed before it can begin to effectively lubricate the engine, so letting your engine warm up before beginning your trip is a great way to ensure maximum performance. When you first start your vehicle the oil is cold and thick, which will require more oil pressure to pump it through the engine and this will also put extra pressure on oil seals.

As it heats up, it thins out and is able to move faster around the engine, which helps it maintain peak efficiency.

spoke to the Ah Kau fella in USJ20. He said not necessary all fan coil will leak. condensation, also some workshop fellas say caused by leak.

only way to check if leaking is by using this green flourescent oil thing to pump through the coil to see if there is actually any green stuff coming out from the coil fins. otherwise, its only the dryer and temp. valve that is blocked (kapputed) and the coil itself blocked by dirt, moss, dust and whatnots.

Fuel needs to be transferred from the gas tank to the engine where it can burn and provide power to the car. Gas from the tank goes to the engine by passing through the fuel injector. The fuel injector converts the liquid gas to a fine mist(spray) so that it can burn easily.

The number of injectors is the same as the number of cylinders in an engine. (For example, a four cylinder engine will have four fuel injector). Gas is delivered from the fuel pump through the fuel rail is directed to the fuel injectors. Audi A5 2.0 TFSI.