BMW’s V-8 is an engine everybody can fall in love with. Here is an article that gives us the facts about the E39 M5’s S62 V8 engine.

To start with, the E39 M5’s aluminum cylinder block is like the M62’s basic design including the long-lasting and weight saving silicon walls that are impregnated with silicon. BMW Engineer Wolfgang Kreinhsfner modestly explained that they wanted to create lots of torque curve. The result is a specific casting with 94.0 mm cylinder with a stroke of 89mm. This displaces approximately 5 liters and like what the hot-rodders used to say, “there is no substitute for liters”.

Breathing is of course a top priority and BMW M spared no expense in developing the S62′s induction system. This is why they designed eight individual throttles, one for each cylinder.
These throttles eliminate a “lag time” inherent in airflow and allow the engine to react much more quickly to throttle movements. The throttles of cylinders 4 and 8 also have their own feedback potentiometers to monitor the throttles’ operation. If a fault is recognized, the system switches to one of four “limp-home” modes that can allow operation at up to 62 mph.

Also, the S62 is BMW’s first V-8 engine equipped with Double VANOS, a system that varies the timing of both intake and exhaust valves on both cylinder banks.

For optimum power output, the BMW engineers designed specifically shaped cutouts in the piston crowns for the intake and exhaust valves. This requires a different piston design for each cylinder bank. Through two separate oil passages in the crankcase, the pistons are oil-cooled. The compression ratio is 11.0:1, a full point higher than for the 4.4-liter V-8; this too contributes to the engine’s high power and torque output.

Special designs for this engine include oil-cooled pistons that are made for two cylinder banks. a G-sensitive lubrication system, modified cylinder head, specific cooling system, special camshaft drive, low-back-pressure exhaust system, and a variable tachometer warning zone.

All these are explained in great details in this very informative article.

Read on at the following site: http://www.usautoparts.net/bmw/engines/s62.php