BMW S58 Owner's Handbook Manual page 56

S58￿Engine
7.￿Oil￿Supply
Index
3
4
5
6
7
With￿these￿changes,￿the￿oil￿supply￿can￿be￿guaranteed￿up￿to￿a￿longitudinal￿acceleration￿of￿1.3 g.￿Even￿in
the￿case￿of￿lateral￿acceleration,￿for￿example￿during￿cornering,￿this￿structure￿enables￿a￿secure￿oil￿supply
up￿to￿constant￿1.3￿g.
In￿such￿driving￿situations,￿the￿engine￿oil￿is￿drawn￿out￿of￿the￿front￿of￿the￿sump￿through￿the￿front￿oil
intake￿snorkel￿by￿the￿return￿pumps￿during￿longitudinal￿acceleration.￿The￿oil￿drawn￿off￿is￿pumped￿back
to￿the￿rear￿part￿of￿the￿sump￿via￿the￿return￿pipe￿in￿the￿aluminium￿frame.￿There￿the￿external￿gear￿oil
pump￿can￿take￿up￿the￿oil￿again￿via￿the￿rear￿oil￿intake￿snorkel￿and￿deliver￿it￿to￿the￿engine￿lubrication
points.
Also￿at￿the￿bearing￿positions￿of￿the￿exhaust￿turbocharger￿the￿engine￿oil￿may￿collect￿due￿to￿the
centrifugal￿force￿during￿lateral￿acceleration￿conditions.￿This￿prevents￿a￿normal￿backflow￿to￿the￿oil
sump￿and￿thus￿also￿a￿supply￿of￿fresh￿cool￿engine￿oil￿at￿the￿bearing￿positions.
To￿counteract￿this￿effect,￿at￿the￿bearing￿positions￿of￿the￿exhaust￿turbocharger￿the￿engine￿oil￿is
continuously￿drawn￿in￿by￿the￿suction￿pump￿and￿delivered￿to￿the￿oil￿sump.
S58￿engine,￿oil￿sump￿with￿suction￿pump
50
Explanation
Suction￿pump
Oil￿intake￿snorkel,￿sump,￿rear
Return￿opening
Oil￿intake￿snorkel,￿sump,￿front￿right
Oil￿intake￿snorkel,￿sump,￿front￿left