Audi A4 A6 B8 2.0 Tdi Quattro Crankshaft

The VW 3.6 FSI engine is a VR6 (narrow V-series EA390) petrol 3.6 liter engine. It was first introduced in 2005 in the Audi Q7 (BHK and BHL engines) and later in other Volkswagens: Passat R36 and CC (BLV, BWS), Phaeton (CHNA and CMVA), Touareg (CGRA, etc.). The 3.6-liter version was built from the 3.2 V6 FSI engine installed on Audi models. The larger displacement significantly increases power and torque compared to the 3.2L engine.

The 3.6 FSI engine has a new 10.6 degree VR shaped cylinder block made of cast iron and layered graphite. The cylinder offset has also been changed from 12.5mm to 22mm. The new block has the same dimensions as the 3.2 VR6 manifold injection engine. The oil pump is integrated in the engine block. Now, the engine has a cast-iron crankshaft, but it's still carried by seven main bearings. There are also new aluminum alloy pistons with a graphite coating.

The 3.6 VR6 engine has a 24-valve cylinder head made of a hypereutectic "Alusil" aluminum-silicon alloy (AlSi17Cu4Mg). The cylinder head design is the same as the 3.2 FSI V6 engine head. The engine has dual overhead chain driven camshafts. One camshaft for all intake valves and one for all exhaust valves. They are all equipped with a continuous timing adjustment function. The maximum camshaft adjustments for the variable valve timing system are as follows: 52 degrees for intake timing; 42 degrees for exhaust. The cylinder head has 4 valves per cylinder (24 valves in total). They vary in length. The intake valves are 33.2 mm in diameter; the exhaust valves are 30.2 mm in diameter; both valves have a 6 mm stem diameter.

The engine has direct fuel injection FSI (Fuel Stratified Injection). The injectors are installed from the intake side. The holes for cylinders 1, 3 and 5 are located above the intake manifold; the injectors for cylinders 2, 4 and 6 are mounted below the intake manifold. The high-pressure fuel pump is located on the cylinder head and is driven by the camshaft timing chain. It produces fuel at a pressure of 1,595 psi (110 bar). The 3.6 FSI has a plastic variable length intake manifold that switches power and torque positions by opening and closing flap control valves. The power setting is on at 0-1,200 and 4,000+ rpm; the torque position is on from 1,200 to 4,000 rpm. This engine also has an electronically controlled throttle/body (drive-by-wire).

The engine is controlled by ECU Bosch Motronic MED 9.1. The ignition is also electronic. The exhaust system is equipped with two pre-catalytic converters and two main catalytic converters. With all these features, the 3.6 FSI engine complies with Low Emission Vehicle (LEV2) and European Euro 5 emission standards.

There are two main types of crankshaft materials, one is steel crankshaft and the other is ductile iron crankshaft. The steel crankshaft is mainly the steel material that determines the main quality of the audi a4 b8 2.0 tdi crankshaft, and the other is the processing technology and processing accuracy. The steel crankshaft generally uses the fillet rolling process. audi a6 crankshaft and Audi A4 Crankshaft industry precision is invisible to the naked eye. In addition to the fillet rolling process, the nodular cast iron crankshaft also needs to be nitrided, and the nitrided crankshaft is black in color. It is recommended for ordinary people to buy Audi A4 Quattro Crankshaft to buy the original engine manufacturer, which can basically guarantee the quality. When selecting, just pay attention to avoid trachoma, pull marks, etc. in the curved part, and generally there will be no problems. Forged steel materials are generally medium carbon steel and medium carbon low alloy steel, such as 45 steel, 53 steel, 35CrMo, 40Cr, etc. The grades of ductile iron crankshafts are QT600-3, QT700-2, QT800-2, QT900-2, QT900-5.

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