BMW S85 Engine (S85B50)

7000112
€10,299.00

BMW S62 engine reliability, problems and repair
This engine called S62B50.
Modernized the block of cylinders for S62. Increased diameter of cylinders to 94 mm, installed the forged crankshaft with a piston stroke of 89 mm, rod length is 141.5 mm, pistons modified their compression ratio is 11.

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BMW S62 engine reliability, problems and repair
This engine called S62B50.
Modernized the block of cylinders for S62. Increased diameter of cylinders to 94 mm, installed the forged crankshaft with a piston stroke of 89 mm, rod length is 141.5 mm, pistons modified their compression ratio is 11.
There are heads of the cylinders block in S62B50 on the top of 3-layers cylinder head gaskets. In S62 increased intake and exhaust ports, used new valve springs and lighter valves. Diameter of inlet valves is 35 mm, exhaust 30.5 mm. Camshafts on M5 E39 have the following specs: duration 252/248 deg, lift 10.3/10.2 mm. Instead of variable valve timing system VANOS, on S62 used Double-VANOS (intake and exhaust camshafts). The M5 E39 engine is equipped with hydraulic lifters and valves needn’t adjustment. Camshafts are set in motion by double-row timing chain.
The engine control unit is Siemens MS S52.
All this allowed to get nearly 5 liter capacity from ordinary 4.4 liter motor and to increase power to 400 horsepower at 6,600 rpm.
The BMW S62 installed on M5 E39 and on Z8 roadster.
Release of this motor stopped in 2003, together with production of E39 M5. But in 2 years there was new BMW M5 E60, with even more powerful S85B50.

BMW S62B50 engine problems and malfunctions

The main disadvantages of BMW M5 E39 are the same as at M62B44. Learn about them more in details HERE. Differences consist in smaller engine lifespan of S62B50 because of too big diameter of cylinder (maybe problem blown head gasket) and active operation of the vehicle.

Besides the E39 M5 has a high consumption of engine oil. Don’t save on it and change more often than it is necessary (optimal 3,000 miles of mileage or 5,000 km). Watch out also for the condition of cooling system and use the best gasoline, then S62 will satisfy you for many years.

BMW S62 engine tuning

S62 N/A Build

It is possible to lift the power of BMW M5 E39 in naturally aspirated variant without problems. You simply have to buy performance exhaust system, headers 4-2-1, carbon airbox.

After that ECU need to adjust under new performance parts. It give about 430 horsepower.

Improve it by buying aggressive camshafts (272/272 deg, lift 11.3/11.3 mm) making head porting and installing the valves increased to 1 mm. Adjusting ECU, S62 power will increase to 480+ horsepower.

Also you may buy individual throttle bodies (52 mm), high compression pistons (CR=12.5) and the most aggressive camshafts. It give more than 500 horsepower and you get completely race engine.

S62 Supercharger

Or you can buy supercharger kit and get a lot of power. There are plenty of BMW E39 M5 supercharger kits installed on stock internals. The most popular is ESS VT1, with the maximum boost 6 psi (0.4 bar). It increases power to 560 HP and 625 Nm. You can find even more productive solutions (10 psi / 0.7 bar), but they are more expensive.

Building BMW S62 Turbo or twin turbo is not good idea too, walls are very thin between cylinders at the motor.

BMW S85 engine specs

Manufacturer

Dingolfing Plant

Also called

BMW S85

Production

2005-2010

Cylinder block alloy

Aluminum

Configuration

V10

Valvetrain

DOHC

 

4 valves per cylinder

Piston stroke, mm (inch)

75.2 (2.96)

Cylinder bore, mm (inch)

92 (3.62)

Compression ratio

12.0

Displacement

4999 cc (305.1 cu in)

Power output

373 kW (507 HP) at 7,750 rpm

Torque output

520 Nm (384 lb·ft) at 6,100 rpm

Redline

8,25

HP per liter

101.4

Fuel type

Gasoline

Weight, kg (lbs)

240 (530)

Fuel consumption, L/100 km (mpg)

for E60 M5

-City

22.7 (10)

-Highway

10.2 (23)

-Combined

14.8 (16)

Turbocharger

Naturally aspirated

Oil consumption , L/1000 km

up to 1.0

(qt. per miles)

(1 qt. per 750 miles)

Recommended engine oil

10W-60

Engine oil capacity, L (qt.)

9.3 (9.8)

Oil change interval, km (miles)

5,000-10,000

 

(3,000-6,000)

Normal engine operating temperature, °C (F)

Engine lifespan, km (miles)

 

-Official information

-Real

200,000+ (120,000)

Tuning, HP

 

-Max HP

600+

-No life span loss

The engine is installed in

BMW M5 E60

 

BMW M6 E63

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