In 1996, the M60 engines were replaced by a new modified M62 series, and the M60B40 engine was replaced by the updated M62B44. The basis for the creation of a 4.4-liter power unit was the predecessor M60B40, the cylinder block of which has changed for an increased cylinder diameter, the sleeves here are nikasil, since 1998 nikasil has been replaced by alusil.
The crankshaft is a new steel long-stroke, with 6 counterweights, the connecting rods remained the old M60, the pistons are new for a diameter of 92 mm.
The cylinder heads are similar to those used on the M60, the characteristics of the M62B44 camshafts have changed (phase 236/228, lift 9/9 mm). The valves remained old: inlet diameter 35 mm, outlet 30.5 mm. The plates and springs are lightened, the cylinder head cover is magnesium.
The double-row timing chain has been replaced with a new single-row chain, the resource of which is approximately 150-200 thousand km. The throttle bodies are new, the intake manifold has been changed, the ignition coils are similar to the M52 engines. In addition, a programmable thermostat was used, the engine management system was replaced with Bosch DME M5.2.
Since 1998, the engine has received a technical update, the VANOS variable valve timing system on the intake shaft, an electronic throttle valve, an intake manifold with smaller diameter channels have been added, the control system has changed to Bosch DME M7.2, and the new engine was called M62TUB44.
|Power output, hp||286 /5700 rpm
286 /5400 rpm (TU)
|Torque output, Nm||420 /3900 rpm
440 /3600 rpm (TU)
|Cylinder block||aluminum V8|
|Block head||aluminum 32v|
|Cylinder bore, mm||92|
|Piston stroke, mm||82.7|
|Recommended engine oil||5W-30|
|Engine oil capacity, liter||7.5|
|Euro standards||EURO 2/3|
|Fuel consumption, L/100 km
|Engine lifespan, km||~330 000|
Disadvantages of the M62B44 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.