Garrett Turbo

RJ Performance asked:








Any individual who has to operate a diesel engine will know that unexpected repairs can both be costly and surprising. Diesel engines are created to give great operation only for a certain amount of time or a certain amount of miles. This determination is come to by the quality and type of fuel that is utilized, the specialized maintenance and the engine operation.

The majority of diesel engines now use a turbo charger to induce greater performance and efficiency out of the engine. Usually the average life of an engine is 60% taking into consideration the turbo charger or turbo used. Once this time frame has been reached, the engine should be replaced or rebuilt. To help get the most out of the life of the turbo, there are a few easy operating tips that you can do to help this along:

Using the correct engine oil. The use of the manufacturer recommended engine oil is important. The engine oil will assist in lubricating the turbo. By utilizing a high quality fuel, you can help to ensure that the oil will give you the most it has to give to give you the best service it can until it is time to change oil and filter. The process of sampling oil can be used to assist in determining if the engine oil is giving the correct protection that is needed as well as letting you monitor the trends of wear and any contamination that could possibly happen. Allow engine to warm up completely. It is very essential that you allow the engine to completely warm up when it is started. This helps the different parts of the engine to begin reaching the operating temperature and helps it to get well lubricated. Allow engine to cool down completely. It is just as essential that you allow the engine to completely cool down prior to shutting it down. A lot of engine manufacturers offer an auto shut down feature to assist in making sure this is done. It is of VITAL importance that you never shut down the engine at any RPM that is above idle.

**The shutting down at a high RPM can and will cause the turbo to spin at many thousand RPM’s without any lubrication. The oil that has been contained in the turbo will get extraordinary hot and will in a way, cook the oil into the bearings and will cause critical oil block passages. This can really reduce the life of the turbo and will result in turbo failure really early. It can also result in much reduced efficiency and poor performance.

By following the above easy and simple tips, you can assist in increasing the diesel engine life and all of its components that go with it.



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A2V asked:




When there is blue smoke from your exhaust what does it mean? Well, blue smoke means that the engine is burning oil.

Now, there are two causes why a blue smoke comes out the exhaust. The first one is that the engine might have a bad ring this is the most common problem. When the engine had a bad ring the effect is not just a blue smoke but also low power especially when your car is going uphill. When the blue smoke is accompanied with a loss of engine power especially when driving uphill, then there is no other cause but a bad ring. The ring prevents the engine oil from entering the engine cylinder and also maintains engine compression to generate power, if the ring is bad the piston and the cylinder will not be fully sealed and the oil will start entering the combustion chamber, this oil will get burn inside the combustion chamber and a blue smoke will comes out the exhaust. Also, a bad ring causes weak compression, if the engine has weak compression you will notice a weak engine power.

Second is when there is a blue smoke from exhaust when accelerating your car. In this condition the cause is a bad valve stem seals. When the valve stem seals are bad the oil is leaking past the valve stems going into the combustion chamber. The oil inside the chamber will get burn thus a blue smoke will comes out the exhaust.

There is another reason of blue smoke that comes out the exhaust, however this is only applicable when your car has turbo charger. Turbo charger have seals that gone bad, in this case the seals of the turbo charger leak and causes the oil to reach the exhaust system, the oil will then smoke when it get contact with the exhaust system component that is hot. The smoke that produce will comes out the exhaust, this the blue smoke that you see from the tail pipe.



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BoostTown.com asked:


This a article from BoostTown.com

Your #1 Source For How To Increase Your Cars Performance

Visit us to find more articles will color pictures that aid in the clarification of the various automotive components

For the full article go here:

http://www.boosttown.com/forced_induction/turbo.php

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The turbo (also known as turbocharger) has been around for many years, almost as long as the internal combustion engine itself. A turbocharger, has two wheels on it. One is called the turbine and this sits in the exhaust system. The exhaust gas leaving the engine causes the turbine and the shaft fixed to it, to spin.

On the other hand of the shaft is the impellor, or compressor wheel. This pulls air in and the forces into the engine. For this to work effectively, the impellor wheel typically spins at 120,000 – 150,000 RPM (Revolutions Per Minute).

Many kinds of bearings used at these high rotational speeds need lubrication and cooling systems. The turbocharger’s lubrication system can be an isolated system or receive oil from the engine’s oil supply. For cooling the lubrication system may double as the cooling system, separate coolant may be pumped through the center housing from an outside source such as the engine coolant system, or the turbine may be air cooled. An oil lubrication and water cooling system using engine oil and engine coolant are commonplace in automotive applications. Special kinds of bearings, e.g. foil bearings, can reduce or eliminate the need for lubrication and reduce the cooling requirement.

Turbos rely on the flow of the exhaust gas through the turbine housing, they only start to spin after ignition has taken place and so there is a delay between opening the throttle and the turbo spinning and producing boost. This is known as ‘turbo lag’ and is considered to be a downside compared to superchargers.

The turbine and impeller are each contained within their own housing on opposite sides. These housings collect and direct the gas flow. The size and shape can dictate some performance characteristics of the overall turbocharger. The area of the cone to radius from center hub is expressed as a ratio (AR, A/R, or A:R). Often the same basic turbocharger assembly will be available from the manufacturer with multiple AR choices for the turbine housing and sometimes the compressor cover as well. This allows the designer of the engine system to tailor the compromises between performance, response, and efficiency to application or preference.