The new model of the junior V8 BMW M62B35 entered the assembly line in 1996 and replaced the M60B30. The basis for the creation of this engine was the M62B44 engine, in the block of which a short-stroke crankshaft was installed, and the cylinder diameter was reduced to 84 mm.
The sleeves remained nikasil and only since 1998 did alusil go. Relative to the predecessor M60B30, new pistons were used in the upgraded motor, ceramic-metal connecting rods remained unchanged.
The cylinder heads have been slightly modified, the camshafts have changed, the characteristics of the new ones are as follows: phase 236/228, rise 9/9. The plates and springs are lightened, the valves are the same as on the M60, the diameter of the inlet is 32 mm, the outlet is 28.5 mm.
Magnesium cylinder head covers, single-row timing chain, average service life 150-200 thousand km. The intake manifold has been improved, new throttle valves, ignition coils are similar to those used on the M52 series, a programmable thermostat has been introduced. Bosch DME M5.2 engine management system.
In 1998, the motor was somewhat modernized and received the name M62TUB35, of the main innovations, it is worth noting the variable valve timing system on the VANOS intake shaft, a new intake manifold with narrow channels, electronic throttle, Bosch DME M7.2 engine management system.
|Power output, hp||235 /5800 rpm
245 /5800 rpm (TU)
|Torque output, Nm||320 /3300 rpm
345 /3800 rpm (TU)
|Cylinder block||aluminum V8|
|Block head||aluminum 32v|
|Cylinder bore, mm||84|
|Piston stroke, mm||78.9|
|Recommended engine oil||5W-30|
|Engine oil capacity, liter||7.5|
|Euro standards||EURO 2/3|
|Fuel consumption, L/100 km
|Engine lifespan, km||~320 000|
Disadvantages of the M62B35 engine
- These engines also have a Nikasil coating, which is afraid of sulfur in the fuel;
- A single-row timing chain has a modest resource of 150,000 km, VANOS serves the same;
- The reason for floating engine speeds is often air leaks in the intake manifold;
- Water-cooled generator has low reliability and repairability;
- The unit also suffers from leaks of coolant and oil from under the valve cover.