S62 V8 4.9 L E39 M5 Engine
Bayerische Motor Werke introduced the E39 M5 model in fall of the 1998 at the Geneva Motor Show. The International Geneva Motor Show or Salon International de l’Auto as it’s called, is an annual car exhibit held every March in Geneva, Switzerland. Considered as an important international auto show, it was here where the BMW highlighted four versions of their entry-level luxury car series. These were the coupé, convertible, touring station and of course, the BMW E39 M5 sedan.
The real highlight of the show and the car, however, was the E39 M5 V8 Engine.
The E39 M5 is the first ever BMW M car powered by a V8 Engine. And here lies the focal point of this sports sedan: a 5-liter, 400-hp V8 engine. This engine is actually based on the M62 engine known as the S62, which came out of the 540i. It can displace a record breaking 4.9 Liters and produces just shy of 400 bhp (294 kW) with a 7000 RPM redline.
The E39 M5 S62 engine also has a Double-Vanos induction system, which changes the mechanism from fixed position operation to continuously variable. The same efficiency is thus added to its exhaust camshaft. Double-VANOS or double-variable camshaft control caused a hefty increase in the engine’s torque while reducing emissions – especially at idle and lower RPM’s. This is because this unique feature alters the intake and exhaust valves for both cylinder banks and individual throttle butterflies for each of the cylinders. It then allows for a much faster engine response time.
This engine was mated with a Getrag Type D six-speed manual transmission with the following gearing ratios: 4.23(1), 2.54(2), 1.62(3), 1.23(4), 1.00(5), 0.83(6). Although it is the same transmission used in the E39 540i, some transmission changes were made to cope with the extra power that the S62 engine produced. To further cope with this extra strength, BMW engineers also did the following adjustments: a reinforced clutch, rear differential utilizing a shorter 3.15:1 ratio and a limited slip differential with 25% maximum locking.
Key differentiators which makes the S62 a special motor:
-Increased bore to 94mm (from 92mm) and increased stroke to 89mm (from 82.7mm) for a displacement of 4,941cc (up from 4,398cc).
-Higher compression to 11.0:1 (from 10.0:1)
-Individual electronically-controlled throttle bodies for each cylinder with ///M Driving Dynamics two-stage control via the “Sport” button
-Double VANOS continuously-variable valve timing for both the intake and exhaust strokes
-Siemens MSS 52 Motronic digital engine control system
-Three-layer steel head gaskets
-Dual air induction system
-Modified cylinder heads
-Hollow camshafts made from nodular cast-iron (this reduces inertia to help with throttle response and improves longevity)
-High-capacity water pump
-Special “Alusil” cylinder wall coating developed for Sauber F1 racing engines
-Heavy Duty duplex chain drive for the intake cams
-Oil-cooled pistons unique to each cylinder bank
-G-force sensitive lubrication system with two separate scavenging pumps, one for each cylinder bank
-Coolant to oil heat exchanger for engine cooling (the first ever used on a gasoline engine).
-Free-flow exhaust with dual catalytic converters and four steel exhaust tips
The result is a car that is capable of accelerating from 0-60 mph in 4.9 seconds. It is electronically limited to a top speed of 155 mph. This engine performance earned the E39 M5 the title, the fastest 4-door sedan in the world at that time.
Two versions of the vehicle were later produced. These are the Euro and the USA models. Top Speed was measured at an awesome 250 km/h (155 mph) with an electronic limiter and 298 km/h (186 mph) without an electronic limiter.
Released to the public in 1999, the E39 M5 was in production until 2003. There were very few modifications made on subsequent models that were specifically designed for comfort, elegance and safety. However, no major changes were done on the V8 engine except for some improvements with the mass airflow sensing nodes, minor ECU upgrades, piston rings and vanos tolerances to reduce noise.
This further improved its ability to swallow massive amounts of air that is needed to mix with the fuel needed by the BMW e39 m5 s62 V8. Final improvements on the Double Vanos induction system were also introduced, as mentioned above.