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Re: proper way to fill coolant (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by moots on January 26, 2000 at 08:16:36:

In Reply to: proper way to fill coolant posted by Siuco on January 26, 2000 at 03:48:29:

Hey Siuco,
I don't know what model e34 you drive.I have a 520i - 2 litre in line 6,12 valve.The expansion tank is beside the radiator (part of the radiator).There are 2 bleed valves on my car.1 is on the t-stat housing and the other is on the radiator itself.I recently experienced slow loss of coolant when the level dropped below min mark.No o'heat due early detection.Leak traced to part where all hoses join at the t-stat housing(multiple leak).Removed all the hoses and cleaned and re-fitted.Filled it up with coolant and opened up both the bleed ports until coolant pours out.Closed the radiator port and refitted the radiator cap.Started engine and let it warm up until coolant pours out from the t-stat port.We're done.Next morning,checked the level and topped up a little.No more bleeding required.Coolant level been steady ever since (been 2 weeks) and temp at a tad below mid mark.


moots '90 520i
: When you talk of re-filling the radiator and bleeding the system (I know this has to be done), how/where do you let the air out? What is the proper proceedure to re-fill the cooling system from empty?




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