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      04-02-2021, 09:29 AM   #2
Sophisticated Redneck
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Drives: 2012 BMW X5 50i
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Quote:
Originally Posted by PrototypeX5M View Post
Would like to know the flow path that the engine/intercooler coolant circuits take if anyone has a diagram of this? cannot find anything anywhere. TIA
The cooling circuits for the n63/s63 engines is a complicated thing. There are two separate circuits involving 5 water pumps and 7 heat exchangers along with enough tubing/hoses to circle the Earth TWICE (ok I lied about that last one, its only enough to circle the Earth once)

Best go to realoem.com and look up your vin, then go to engine and cooling sections and you can see a complete breakdown of every radiator, coolant line and water pump.

EDIT: Did some poking around, do a Google search for n63engine.pdf. Download it and scroll down to cooling diagram. S63 engine is identical except for additional heat exchanger and water pump for intercooler circuit.

Last edited by Sophisticated Redneck; 04-02-2021 at 09:53 AM..
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