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|3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.|
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I have a 1995 325i convert. the air conditioner works fine, but when turn on heat only cool air comes out. Any sugesstion on the problem is appreciated
careful when you change the t-stat if you have a plastic housing. They seem pretty strong but i cracked mine putting it back together. didnt even notice until i started having issues and noticed the leak. IMO the aluminum aftermarket ones are worth it!
Do u have to take of the fan to change the thermostat. look tight with fan there?
hi there before you change the thermostat leave your car running at normal temp and check the the top water hose coming of the thermostat housing if that remains cold then you know that your thermostat is not opening to let the water travel around the system,the other thing is that if it did remain closed then your car would be over heating.next thing to do is check you dont have an air lock in your cooling system,this is very easy to do and you do not need 2 people to do this.All you have to do is open your radiator cap and the small round philips screw on the right hand side of radiator cap,now pour your water in the radiator and keep filling UNTIL you see water coming out the bleeder hole ,take your time and dont worry if your filling your radiator right to the top as this is the only way taking out the air out of the cooling system.When the water has come out the bleeder hole, screw in the small philips screw then your radiator cap thats it.DO NOT have your engine on while you are doing this you dont need to.Run the engine at normal operating temp and check your heater.if the problem persists then its most probably your heater valve.let me know
You do need the engine on in order to FULLY bleed the cooling system, proper bleeding technique has been outlined by many of us multiple times. Running the engine will allow the water pump to do just that pump the water through the cooling system, it allows the thermostat to open, and turning the heat all the way up opens the heater valve so coolant will flow through the heater core, all of which are necessary if you want to properly bleed the cooling system and prevent air bubbles. It might take a while but you want to close that bleeder screw when you see NO MORE BUBBLES coming out. So in summary you do need the engine on.
yeah it will, but not all of it, the bleeder hole isn't the highest point in the cooling system, obvious design flaw, this allows air to get trapped at other points, this means that just pouring it in isn't enough, you need to circulate the coolant through the system in order to evacuate all possible air pockets, you are talking about a cooling system that is self bleeding ie the fill point is the highest point of the system this is true on European e36 m3's, not true on the car we're talking about, if you want to do it the way you're stating and that works for you, great, but it's not the way I would do it, and certainly not the way i would instruct/recommend others to do. This is something I've done multiple times on multiple vehicles and have had ZERO problems to date by following the technique I explained.
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