01-13-2024, 09:58 PM | #1 |
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Coolant vacuum fill system
Anyone done their coolant flush and fill on their M2 and use the OEM tools 24444 system? I wanted to see what would be a good suction range due to all the plastic pieces on our vehicles.. would -25 bar be too much?
Also once you have done this coolant refill and bleed, did you also bleed using the built in electric bleeder in the car? Thanks! |
01-13-2024, 10:44 PM | #2 | |
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01-13-2024, 10:45 PM | #3 | |
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01-13-2024, 11:24 PM | #4 | |
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01-14-2024, 12:00 AM | #5 |
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I've never seen people do it that way and ISTA doesn't outline that as the procedure to follow so I am unsure if that's the best way to do it - because I am now worried about the heater core and all those lines being subjected to the large vacuum induced by the vacuum bleeder. But If those components are ok with the vaccum then I don't see why not.
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01-14-2024, 09:35 AM | #6 | |
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Excellent. I’ll definitely keep an eye out for your report on using a vacuum bleeder. There’s always more for me to learn! |
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01-14-2024, 11:41 AM | #7 |
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Is there any reason to really consider not doing the built-in bleed procedure? It makes sense to me to try to use the vacuum system anyway to make things easier for the built-in procedure but it doesn't require any sort of scan tool or ISTA etc to run, is battery draw likely to be that bad?
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01-14-2024, 12:32 PM | #8 | |
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01-14-2024, 01:13 PM | #9 | ||
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In 2020 when I did my coolant bleed I used my ctek in supply mode and bleed the system 10-15 times consecutively till the coolant didn't drop anymore. Then i let the car charge, and the next day I did another 10-15 bleeds just to make sure there were absolutely no bubbles left.
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02-06-2024, 07:41 PM | #10 |
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When changing any fluid, I like to collect everything that came out, and measure it. Then I know if what I put in roughly matches what came out, and I have a high likelihood that it's properly filled.
I've done coolant twice on my M235, which essentially the same N55 as the M2. Only used the electronic bleed process. Both times the volumes were within 100ml of each other. So, I'm thinking the electronic bleed alone is fine. I'm sure the full vacuum has advantages, but some of those advantages might just be faster cleaner fills in a production shop environment. No carefully pouring fluid into a tippy funnel at a slow rate. Just one big simple whoosh and it's done. Could also just be a BMW habit thing given their history of needing it. |
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02-06-2024, 08:43 PM | #11 | |
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02-07-2024, 11:45 AM | #12 |
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When it comes time to change my coolant, I’ll just have the dealer do it with the vacuum system. I can do it myself, but there’s nowhere for me to take the used coolant, and I refuse to dump it on the ground and harm the environment.
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02-11-2024, 03:51 PM | #13 | |
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Out here in CA, the county household hazardous waste facility takes it. I drive up, show my Driver’s License, pop the trunk, they grab the bottle and shut the trunk, and I drive off. Done and dusted. |
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02-11-2024, 04:14 PM | #14 | |
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But yeah it's best not to just dump it into the environment
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