Cooling System Coolant Hoses Bmw 3 E90 335i N54 Usa Cooling System Hoses System Drives: 11' 335is dct. join date: jun 2015. location: gatineau, quebec. itrader: (0) n54 cooling system explained? i'm looking at diagrams on realoem but having a hard time fully understanding which order and where the coolant flows. just looking at the thermostat housing with like 3 or 4 inlets outlets i've got no clue of the flow. Bmw cooling system fundamentals. the engine, hoses, radiator, and expansion tank are filled with coolant mixture. on a bmw this is a mix of monoethylene glycol and distilled water. the water pump circulates the coolant and keeps the system pressurized. starting from the pump, coolant enters the engine block and cylinder head to regulate.
Bmw N54 Coolant Hose Diagram Headcontrolsystem 300 335 hp. torque (lb ft) 300 332 lb ft. the bmw n54 engine utilizes a twin turbo, direct gasoline injection design. it’s the first mass production engine from bmw to feature this technology together. an aluminum open deck block and aluminum head help keep weight down. a forged crank and rods deliver solid strength. 12 engine electrical system (n54) 13 fuel system (n54) 16 fuel supply system (n54) 17 cooling system (n54) 0 coolant, checking cooling system; 10 radiator, expansion tank, pipes; 11 engine radiator with attachment; 1 ra removing and installing radiator (n53, n54) page 705; 2 ra removing and installing replacing fan cowl with electric fan (n54. 2008 335i n54. i had my water pump and thermostat replaced at 72k; and now at 90k, i have a massive coolant leak somewhere when the system is under pressure. it is on the driver side in between the radiator and the engine (very difficult to see from the top) and it sprays coolant steam all over the serpentine belt causing it to squeak. Reliability of the bmw n54. everything in and around the engine is to blame for bmw n54 dependability. it's far simpler to declare what isn't a problem than it is to go through the laundry list of problems. oil leaks and cooling system issues are all too typical. injectors and hpfp both experienced early issues that were costly to remedy.
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