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      06-14-2018, 12:57 PM   #23
carbonM
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Quote:
Originally Posted by cbakking View Post
Found this, it sounds like cap needs to be closed during this procedure:
https://www.newtis.info/tisv2/a/en/e...check/CMAxpWPX

Venting cooling system: Note:
Do not leave the coolant expansion tank cap open during the venting procedure.

1- Open vent plugs on coolant feed lines to turbocharger.

2- Add coolant up to top edge of expansion tank. Coolant level must not drop further! No drop in coolant for approx. 1 minute. Close vent plugs on turbocharger when coolant emerges.

3- Set heater to maximum temperature. Press Automatic button. Then turn blower down to lowest stage for a minimum period of 5 minutes.

4- After switching off heater pump, add further coolant up to top edge of expansion tank.

5- Check cooling system for leaks.

6- Close expansion tank.

7- Start engine. Allow engine to idle for approx. 1 minute. During this period, press accelerator pedal 3 times (each time lasting 5 secs.) to approx. 3000 rpm.

8- Warm up engine and activate map thermostat via BMW diagnosis system.

9- When engine has cooled down, check coolant level and adjust to max.

Not sure about step 1? what's vent plugs on coolant feed lines to turbocharger?
I'm not completely sure, but it might be the two screws that sit on the t-pipe for the coolant hoses?
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      06-14-2018, 01:30 PM   #24
philly42
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Quote:
Originally Posted by carbonM View Post
I'm not completely sure, but it might be the two screws that sit on the t-pipe for the coolant hoses?
Yup, that's it.
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      06-15-2018, 01:28 PM   #25
cbakking
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Performed the coolant bleed, I was able to see the coolant movement in main coolant expansion tank but nothing was happening in intercooler expansion tank? is my intercooler water pump dead? or does it get activated at certain temperature?
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      06-15-2018, 10:58 PM   #26
carbonM
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Quote:
Originally Posted by cbakking View Post
Performed the coolant bleed, I was able to see the coolant movement in main coolant expansion tank but nothing was happening in intercooler expansion tank? is my intercooler water pump dead? or does it get activated at certain temperature?
I found mine would only turn on when it was below the full level.
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      06-18-2018, 12:02 PM   #27
cbakking
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Quote:
Originally Posted by carbonM View Post
I found mine would only turn on when it was below the full level.
I'll try it again, with coolant fill up as mine was at right above "min", to right at "max" level.
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      09-06-2020, 11:49 AM   #28
Gerandel
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coolant issues

I have a bmw x5 2007 3.0 i replace pump thermostat coolant cap and tank and still leaking from the coolant cap idont know what to do is frustrate no found any solution even with couple bmw shop they dont know what is the issue gasket heat was tested and are ok no leak on the hose only from the cap already replace 4 and 2 diffrent cooolant tank no making any change with my issue is some one know how to resolve this i apreciate it
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      05-07-2021, 11:33 AM   #29
StewtheBassman
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Okay so I found this post through a google search. Little stream of coolant on the garage floor a couple of days ago. Before purchasing and new parts (which thank heavens are affordable thanks to the interwebs) I refilled the coolant and squeezed the cap closed. Ran it 100+ kms yesterday in stop and go and highway traffic, with and without the AC and/or fan. The car has been home now for 18 hours and not a single leak. Could it be the cap was loose??? Sheesh!!
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      03-18-2023, 10:53 PM   #30
skoold2003
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Quote:
Originally Posted by StewtheBassman View Post
Okay so I found this post through a google search. Little stream of coolant on the garage floor a couple of days ago. Before purchasing and new parts (which thank heavens are affordable thanks to the interwebs) I refilled the coolant and squeezed the cap closed. Ran it 100+ kms yesterday in stop and go and highway traffic, with and without the AC and/or fan. The car has been home now for 18 hours and not a single leak. Could it be the cap was loose??? Sheesh!!
Did it end up just being a loose cap? Mine had a random leak today..
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