Quote:
Originally Posted by Sophisticated Redneck
Quote:
Originally Posted by ncmoore12
Hey yall,
Has anyone done a coolant flush or replacement on their X5M's s63? I removed my passenger intercooler to replace the vacuum lines leading to the boost solenoid. Figured i should just replace the coolant since its been a while anyways. Do we really have to remove all the plastic under covers to access the passenger side lower radiator hose connector and disconnect that? Or is that really how you flush it? also how much coolant do we replace and I assume we fill the expansion tank first, then run the car till the pump turns on to pull coolant to different places and then fill again?
This might be the best I found but for an M5. Is it even worth it? Should I just fill it up and run and fill it up to make up for the coolant I lost removing the intercooler?
https://f10.m5post.com/forums/showthread.php?t=1708203
TiA! |
That is the only way to get 100 percent of the intercooler coolant out. You can get roughly 80 percent out if you disconnect the lower tube on the passenger side that runs to the water pump in front of the engine radiator. Requires pulling the fan though.
Do a search for the fill and bleed procedure, if memory serves you fill the Intercooler reservoir past the full mark to the very top, then activate the bleed procedure (something odd like put heat to full temp but fan low, hold throttle while engine off, do a search you will find it). Takes about 10min and will suck the coolant down, when it goes down fill it up to the full mark. Hook up a charger whiles it's running. |
Yup that's the bleed procedure - just had to do it when I replaced my expansion tank.
It's ignition on, both temp dials set to max, fan on low, and hold the accelerator pedal to the floor for 10ish seconds. You will hear the electric water pump turn on and should hear fluid moving through the system. I had a battery charger hooked up because each bleed cycle lasts about 10 minutes and places a decent draw on the battery.