Cooling system repair on e46

[ChrisBrand]

Hey guys. So on boxing day i got stuck in Somerset West in traffic for 4 hours. Car overheated and found a perished hose that burst. Ordered new parts. I just wanted to know the procedure for refilling the system so there is no air bubbles and how much coolant or anti freeze should be used. Thanks guys will try and post photos later

 

[speeddemon]

Chances are that u still gonna have air bubbles....make sure you bleed the system properly once you've finished.
Not sure how many anti freeze one should use but i used about 3L :fencelook:

 

[SP33DYV]

I used 50% distilled water mixed with 50% BMW coolant, and then bleed the system properly. Set the heater to max and start the car. Open the bleed screw as soon as you feel the return pipe gets warm and continue until no more bubbles appear from the bleed screw. Check coolant level again once the engine has cooled down.

 

[ChrisBrand]

I should add that my aircon does not work at the moment. Dont know why but the fan does not kick in. I will switch the heater to max. I have 2 bottles, so 2L of coolant that i will throw in and i take it its only the upper radiator hose bleed screw i have to open?

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Should the cap on the expansion bottle stay off at all times till the end? Or should i close the cap and open the bleed screw till the water comes out and no bubbles and then just close the bleed screw

 

[speeddemon]

I should add that my aircon does not work at the moment. Dont know why but the fan does not kick in. I will switch the heater to max. I have 2 bottles, so 2L of coolant that i will throw in and i take it its only the upper radiator hose bleed screw i have to open?

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Should the cap on the expansion bottle stay off at all times till the end? Or should i close the cap and open the bleed screw till the water comes out and no bubbles and then just close the bleed screw

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Expansion bottle cap gotta stay on buddy:thumbs:

 

[SP33DYV]

Yip, cap needs to stay on. And wait until the temp is at normal operating temp before you stop bleeding the cooling system.

I mix the anti-freeze/coolant with water (50/50) before I pour it into the radiator.

 

[ChrisBrand]

Thanks very much guys. All seems good now. Just had to add another cup of water this morning.

 

[SP33DYV]

Thanks very much guys. All seems good now. Just had to add another cup of water this morning.

That's almost nothing. :thumbs:

 

[speeddemon]

:thumbs:

 

[Conry]

That is to mention your mechanical and/or electrical-driven fans should be in operation properly once triggered by operating sensors. If your automotive is heating, a minimum of one in all the on top of isn't being met. If your automotive is heating at idle (say in traffic) and you're certain that 1) you've got adequate water within the system and 2) aforesaid water is air/bubble free, then air is failing to pass the radiator. you wish to analyze why. Either the fan(s) are not in operation properly (not processing air or enough air) or your fan switch is not telling the fan to show on.:blab:

 

[Zack]

That is to mention your mechanical and/or electrical-driven fans should be in operation properly once triggered by operating sensors. If your automotive is heating, a minimum of one in all the on top of isn't being met. If your automotive is heating at idle (say in traffic) and you're certain that 1) you've got adequate water within the system and 2) aforesaid water is air/bubble free, then air is failing to pass the radiator. you wish to analyze why. Either the fan(s) are not in operation properly (not processing air or enough air) or your fan switch is not telling the fan to show on.:blab:

 

[SP33DYV]

That is to mention your mechanical and/or electrical-driven fans should be in operation properly once triggered by operating sensors. If your automotive is heating, a minimum of one in all the on top of isn't being met. If your automotive is heating at idle (say in traffic) and you're certain that 1) you've got adequate water within the system and 2) aforesaid water is air/bubble free, then air is failing to pass the radiator. you wish to analyze why. Either the fan(s) are not in operation properly (not processing air or enough air) or your fan switch is not telling the fan to show on.:blab:

Exactly!

 

[Kish2604]

:biglol:

Ditttooooo......

 

[ChrisBrand]

Kinda understand what was written. Reason for overheating was the lower expansion pipe burst because of age. And my upper radiator hose where the breather screw is the screw broke when i tried to loosen it. So just normal routine pipes that go with age. But my aircon fan does not work. One place says its maybe just the resistor and the dealers tell me i have to replace the whole setup which is R6000. So i will go for a 3rd opinion. But the main fan works. Just not the front aircon fan

 

[Charlie Brown]

It's pretty easy to trace the fan issue, just need a Volt meter, start at the fan and work backwards seeing if you have 12 volts on less, could be just a fuse, relay or wire.

Odd that the bottom hose went, normally the top hoses go first, unless you have already done that one - if not I'd do that one too.

 

[ChrisBrand]

Thanks Charlie! Hopefully the fan issue is something small. It is weird that the bottom went but im not sure if the others were replaced before. Will keep u guys updated