few months ago my coolant filler cap came off whilst driving, lost a lot of coolant but did not overheat and no damage done in the long term.
I had to top up the coolant with boiling water immediately whilst the car was in coolant priming mode.
So today car is in storage and my mind turns to the reduced anti freeze concentration, coolant swap required.
I plan to let the water pump do the draining for me, pop the recirc hose off the header tank and connect it to a bucket, coolant prime mode and off we go.
So question is does anyone know any reason why this will not work? I know it wont completely empty the block but worth a try i think..
Thoughts guys??
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Emptying/changing coolant
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- Senior Member
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Emptying/changing coolant
Mark
Plymouth
E89
35i
Carmine Red
Black leather
Plymouth
E89
35i
Carmine Red
Black leather
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- Lifer
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Emptying/changing coolant
Why not just do it properly and be done with.
- Chippie
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Emptying/changing coolant
I can’t see any reason for it not to remove enough water to then top back up with neat antifreeze, I think there can be some incompatibility with certain types of antifreeze, so I’d suggest probably buying it from BMW, also make sure the battery is fully charged and possibly even keep it on a battery charger while the pump is running and turn the ignition off once water stops flowing so you don’t burn out the pump, although it probably wouldn’t anyway.
E89 35is space grey Kansas coral red leather
- grannyknot
- Member
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Emptying/changing coolant
You can pick up a coolant tester for a few bucks and measure the temp that your current coolant is good for.
2008 E86 M coupe
Toronto, Ontario
Toronto, Ontario
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- Senior Member
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Emptying/changing coolant
Yeah I have one of those, thats really going old school, will test it anyway..grannyknot wrote: ↑Mon Nov 21, 2022 12:58 pm You can pick up a coolant tester for a few bucks and measure the temp that your current coolant is good for.
Mark
Plymouth
E89
35i
Carmine Red
Black leather
Plymouth
E89
35i
Carmine Red
Black leather
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- Senior Member
- Posts: 2552
- Joined: Fri May 26, 2017 3:40 pm
- Location: Plymouth
Emptying/changing coolant
Cheers Chippie some good tips there, battery charger is a must I think so going to go ahead with it.Chippie wrote: ↑Mon Nov 21, 2022 10:32 am I can’t see any reason for it not to remove enough water to then top back up with neat antifreeze, I think there can be some incompatibility with certain types of antifreeze, so I’d suggest probably buying it from BMW, also make sure the battery is fully charged and possibly even keep it on a battery charger while the pump is running and turn the ignition off once water stops flowing so you don’t burn out the pump, although it probably wouldn’t anyway.
No point dtruggling doing it the 'right way' as some suggest. Thinking outside the box generally works better than 'sheeping' it.
will update once done
Mark
Plymouth
E89
35i
Carmine Red
Black leather
Plymouth
E89
35i
Carmine Red
Black leather