How normal is the negative pressure of ea888 engine?

Ea888 engine negative pressure 15 is normal.

The third generation EA888, the model is more advanced; Secondly, he kept the ZF 8AT gearbox, which is better than the current dual clutch. And this car is the swan song of Audi's full-time four-wheel drive quattor, and there is no full-time four-wheel drive since then.

Negative pressure value is low. The negative pressure value of this car should be 80 to 100, which is obviously low, which is estimated to be caused by the aging of the waste gas valve. The wastegate valve does not mean that it must be completely reimbursed before it can be replaced. It should be tested for about three years, and it should be replaced directly if the negative pressure value is low. This is a consumable.

Take off the zipper cover. This is the third generation chain system, but this car is in the early stage of the third generation. The oil pump gear is a pinion and the tensioner is white. Because this batch of oil pump cold cars may have abnormal noise, the big gear and black tensioner were replaced later.

The correct way to remove the valve cover is to come down with the exhaust camshaft to avoid scratching the camshaft and the valve cover.

Engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engine (reciprocating piston engine) and external combustion engine (Stirling engine, steam engine, etc.). ), jet engines, motors, etc. For example, internal combustion engines usually convert chemical energy into mechanical energy.

The engine is suitable for both power generation devices and complete machines (such as gasoline engines and aero-engines) including power devices. The engine was first born in Britain, so the concept of engine also originated in English. Its original meaning refers to "a mechanical device that generates power".

The external combustion engine, that is to say, its fuel burns outside the engine, was invented by R. Stirling of Scotland in 18 16, so it is also called Stirling engine. The engine converts the thermal energy generated by combustion into kinetic energy.

Watt's improved steam engine is a typical external combustion engine. When a large amount of coal is burned to generate heat energy to heat water into a large amount of steam, high pressure is generated, and then this high pressure pushes the machinery to do work, thus completing the conversion of heat energy into kinetic energy.