BMW M5 Wartungshandbuch PDF herunterladen (Seite 38)

Electric oil pumps

When cornering at high speeds, the

centrifugal force forces the engine oil into the

outer cylinder head so that it can no longer

flow back into the oil pan of its own accord.

It must therefore be pumped off by the

respective oil pump and returned to the oil

sump. The electric oil pumps are activated by

the engine control unit that determines the

cornering speed with a yaw rate sensor.

The electric oil pumps are protected by heat

shields from the heat radiated from the

exhaust manifolds.

Oil spray nozzles

Double-hook oil spray nozzles are used on the

S85 for the purpose of cooling the piston

crown.

The oil spray nozzle is equipped with an

integrated pressure control valve.

Opening pressure: 1.8 to 2.2 bar

Closing pressure: 1.3 to 1.9 bar

Oil filter housing

A thermostat that opens the path to the

engine oil cooler is mounted in the head of the

oil filter housing.

Exhaust manifold

The S 85 is equipped with a 5-in-1 exhaust

manifold with near-engine catalytic converter

for each cylinder bank. The pipes or runners of

the manifold are made from stainless steel

(X 15 Cr Ni Si 20-12) and have a wall thickness

of 0.8 mm.

24 - Exhaust manifold

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BMW M5 Wartungshandbuch Seite 38