17 Oil supply · To ensure a reliable engine oil supply even

911 Engine 1 17 Oil supply To ensure a reliable engine oil supply even during extreme longitudinal and lateral acceleration, the new 911 Carrera also has integral dry sump lubrication (without external oil tank). By restricting the axial play tolerance of the impellers, the delivery rate of the oil pump has been increased by approx. 5 %. 19 Cooling system To achieve uniform distribution of coolant for all cylinders, the same principle of cross-flow cooling circuit with fully integrated coolant ducting is used on the new 911 Carrera as was used on the previous model. This prevents temperature differences between the individual cylinders. The coolant is fed through integral lines. On models with manual transmission, the cooling takes place via two coolers (4). These are fitted in the wings in front of the 1_5_98 front wheels. On models with Tiptronic 1 - Water pumptransmission, an additional 3rd cooler (14) 2 - Crankcaseis located in the front of the vehicle. This 3 - Thermostatfacilitates cooling of the ATF via an 4 - Radiatoradditional oil/water heat exchanger in the 5 - Heat exchanger, heatingcommon water circuit. 6 - Oil/water heat exchangerTo avoid icing up of oil separator at low 7 - ATF heat exchanger (only Tiptronic)temperatures, the oil separator is flushed 8 - Electric shut-off valve (only Tiptronic)with coolant. 9 - Expansion tankBecause of the special coolant, a coolant 10 - Shut-off valvechange on the new 911 Carrera is also not 11 - Bleeder pipe (engine)necessary. 12 - Bleeder pipe (radiator) 13 - Oil separatorEnsure to fill up or top-up only with the 14 - Cooler (only Tiptronic)coolant specified by Porsche. 2002 Service Information 1 - 15