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Message: <blockquote data-quote="bimmerholic" data-source="post: 703977" data-attributes="member: 16686">Close...you've got 2,3&4 right. Here's how to proper bleeding: (Note: when filling up the coolant reservoir, do it slowly and steadily and calmly. Do it fast and you're gushing more air in.)1) Suggest to do it only in the morning when engine is cold. (When car is asleep for 8hrs or so overnight)2) Without starting the engine, turn up the heater both driver & passenger side to 32C with speed 1 or 2 bars.3) Pop hood up and you should hear your auxiliary water pump and heater valve turned on. You know this by the slight but constant vibration on the auxiliary water pump. (it's on the left side of the front strut tower for pre-facelift and next to left side of radiator for facelift respectively).4) Unscrew & remove coolant reservoir cap and both the bleeder screws.5) SLOWLY fill up the the reservoir till the brim and let it overflow while constantly monitoring the amount of air bubbles purging out of the bleeder holes. Note: The bleeder hole on the thermostat housing will be the first to purge air out. 6) Once you notice there is no longer air bubbles from the bleeder hole that's on the thermostat housing, stop the filling and slowly tighten that bleeder screw back on the thermostat housing.7) This step forward you will continue to fill and let it overflow. Continue filling until the second bleeder hole (next to reservoir) has no more bubbles. Stop the filling and screw back on this bleeder hole. 8) At this stage you would have bled 99% of air from the entire cooling system. Continue bleeding till there are no air bubbles at all from the coolant reservoir. Now you can tighten the reservoir cap back on.9) DONE!You'll notice your engine core temp will be lower now (if you have air previously trapped in the cooling system).- - - Updated - - -Close...you've got 2,3&4 right. Here's how to proper bleeding: (Note: when filling up the coolant reservoir, do it slowly and steadily and calmly. Do it fast and you're gushing more air in.)1) Suggest to do it only in the morning when engine is cold. (When car is asleep for 8hrs or so overnight)2) Without starting the engine, turn up the heater both driver & passenger side to 32C with speed 1 or 2 bars.3) Pop hood up and you should hear your auxiliary water pump and heater valve turned on. You know this by the slight but constant vibration on the auxiliary water pump. (it's on the left side of the front strut tower for pre-facelift and next to left side of radiator for facelift respectively.4) Unscrew & remove coolant reservoir cap and both the bleeder screws.5) SLOWLY fill up the the reservoir till the brim and let it overflow while constantly monitoring the amount of air bubbles purging out of the bleeder holes. Note: The bleeder hole on the thermostat housing will be the first to purge air out. 6) Once you notice there is no longer air bubbles from the bleeder hole that's on the thermostat housing, stop the filling and slowly tighten that bleeder screw back on the thermostat housing.7) This step forward you will continue to fill and let it overflow. Continue filling until the second bleeder hole (next to reservoir) has no more bubbles. Stop the filling and screw back on this bleeder hole. 8) At this stage you would have bled 99% of air from the entire cooling system. Continue bleeding till there is no air bubbles at all from the reservoir cap. Now you can tighten the reservoir cap back on.9) DONE!You'll notice your engine core temp will be lower now (if you have air previously trapped in the cooling system).</blockquote>

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