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Hi from South Africa,need some advice regarding my Bmw 320i 2002 model.It uses about 100ml of coolant after every 100km,not leaking but whe I do add coolant there's a gurgling sound that was not there.Only started after replacement of o-ring on water hose. Any advice please.
 

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hi, are you using BMW coolant, did you burp the system?
if youre having to top off its leaking from somewhere, search and look for water, coolant marks around fittings, hose necks, bleed valves, etc...
 

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not sure the steps to burp, but you have to belch/burp the system, to get ALL the air out as our cars used a closed system.
i think there is a thread on how to do it on here somewhere if u search.
 
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