Engine BMW S65B40 under the hood

Engine BMW S65B40

The BMW S65 engine is a V-8 naturally aspirated engine with two overhead camshafts (DOHC), 32 valves, which replaced the S54 six-cylinder engine and has been in production since 2007. The BMW S65 is only available on the BMW M3 and has the same bore / stroke as the 10-cylinder S85, but unlike the S85, the VANOS system is driven by oil pressure. The replacement for this power unit was the 6-cylinder – S55.

Specifications

Manufacturer Munich Plant
Also called S65
Production years 2007-2013
Cylinder block alloy aluminum
Fuel system injector
Configuration V
Number of cylinders 8
Valves per cylinder 4
Piston stroke, mm 75.2
Cylinder bore, mm 92
Compression ratio 12.0
Displacement, cc 3999
Power output, hp 420/8300
Torque output, Nm / rpm 400/3900
Fuel type 98
Euro standards Euro 4
Weight, kg 202
Fuel consumption, L/100 km (for E90 M3)
— city
— highway
— combined
17.0
9.0
11.9
Oil consumption, gr/1000 km up to 1000
Recommended engine oil 10W-60
Engine oil capacity, liter 8.8
Oil change interval, km 7000-10000
Normal engine operating temperature, °C
Engine lifespan, km
— official information
— real

200+
Transmission
— 6MT
— M DCT
ZF Type-G
Getrag GS7D36SG
Gear ratios, 6MT 1 — 4.06
2 — 2.40
3 — 1.58
4 — 1.19
5 — 1.00
6 — 0.87
Gear ratios, M DCT 1 — 4.78
2 — 2.93
3 — 2.15
4 — 1.68
5 — 1.39
6 — 1.20
7 — 1.00

Frequent problems

Engine BMW S65B40
During the operation of the power unit BMW S65 are faced with the problem of rapid wear of the connecting rod bearings – they must be changed every 80 thousand kilometers. To avoid serious damage, it is advisable to replace the liners in advance.

Periodic repairs are required for the Vanos system; for this, a repair kit is used. Running problems can lead to engine rattling.

The motor works without problems for a long time, subject to regular maintenance, no overheating, timely replacement of worn parts.

The part was used on: Tags

Leave a Reply

Your email address will not be published. Required fields are marked *