DIY: Bleeding BMW M62 Coolant System

hello everyone in this video here I'll be doing a demonstration how to bleed the coolant system on your BMW e39 now let's particular model I have here is a 97 540 now this may also apply to other models as well I'm not sure exactly about the inline 6 version but any other BMW models that include the v8 particular towards the m62 the 4.4 liter so this would also be included in the 740 and the 840 as well so basically the reason here I'm bleeding the coolant system is that I've already replaced the valet pan itself I had to drain the coolant in the vehicle and now I'm just ready to check everything out make sure the all the air is out of the coolant system now basically when I start by doing years before you start up your vehicle you want to make sure it does have coolant in it so I've done here is I've went to BMW I purchased their specific coolant for the vehicle now is blue in color for this particular model here and it was a concentrated version so I had to do a 50:50 equal mix with water and the coolant and put it in tank here now as for the water I purchased distilled water for this you can go ahead and use regular tap water normally I wouldn't recommend that though because there are some additives which can cause the system to plug up and it does does tend to have a buildup inside the inside your cooling system and it could cause problems down the road distilled water doesn't have any additives in it so you don't have to usually worry about that so basically what I've done is I've added the cool into the vehicle already and what you want to do is go around is just squeeze the coolant line such as this one on top here now what happens here this does push the air out of the system and you can if you can reach down to the bottom one as well it's a little hard to see here but there is one located right down the bottom there you want to go ahead and also squeeze that one too it helps to push the air out of the system and even the ones over by the water valves there that go to the rear coolant manifold at the back you can also squeeze those hoses and it just helps the air out of the system next we want to start by doing is removing the bleed screw on the system now the bleed screw is located right here I won't be doing this in this video here because I've heard stories of people actually breaking these off I don't want to run into that hazard here now the bleed screw does go right through to the cooling tank itself so what I'll do in this application you're I'll just leave the you can either leave the lid on loosely so the air is able to pass through or you can just leave it off what I'm gonna do now you don't normally have to worry about the fluid splashing out of here so once you start your vehicle up here basically we want to do in order to open the heater valves up so the coolant does run fully through the system you don't have any risk of any air pocket what we want to do is turn on your heater controls now you want to have them both max on both sides if you do have dual climate control and I have the fan on about halfway know this ensures the heater valves are fully opened and they will stay open next we want to do is start your vehicle up and now it is running at a higher ATO because it's cold right now so you gotta wait till it does warm up and what you want to do is watch temperature gauge until it comes up halfway once the temperature gauge does start coming up the thermostat will open up eventually and this will run the coolant fully through the system then so it is fully free-flowing when the vehicle is cold what happens is the thermostat does cold close up until the engine is warmed up until the coolant does reach a certain temperature then it does expand and we'll be okay now in order to ensure all the air is bled out of the system it does make it a lot easier doing this is you want to park the car in a bit of an incline so the Hyatt highest point of the car it tends to be the front of the car basically how this works the cooling system is it'll let the air escape to the highest point of the cooling system so in this case what it would be is the expansion tank now in order to properly check the coolant level you have to do this when the engine is cold and the coolant is cold as well what happens if you do check it when it is warm or hot or while it's running this is a pressurized system so there is pressure which will which will come out of the system and the the flotation inside the tank here which does give you the proper reading with a little level indicator that goes even with the top of the thread so it will actually stick up quite a ways so that's why I wanted to when the vehicle is cold and not running now as I mentioned before the little flotation device inside there the little ball on top should be even with the threads where the cap does screw and I would show you this but except my engine is currently warm right now so I will wait for it to cool down okay now you see I turn the car off I had the car running for about 20 minutes now I have put the cap back on here I just wanted to see if it would build up pressure just don't sure there wasn't any leaks after I've replaced the gaskets and and piping anything like that in the car just want to make sure once it does build up pressure that just tells me that there's no leaks in the system there's no where the pressure is leaking out now with the car just to mentioned earlier I have the car running for about 20 minutes with the cap off I kept coming back all the time every bug to five 10 minutes just making sure that the that it wasn't going down on coolant when I did going down on cooling I would add accordingly to it and after that I still left the heat on full now I have turned the car off here just to let it cool down basically what this does once I cool it down and we'll just let the coolant contract again and see if there's any hair locks and see if the coolant does go down any in the vehicle itself just to ensure it's not low on coolant what I'll do again basically do the exact same procedure over again I will start the car back up do this a second time ensure that the coolant doesn't go down again run it with a rag cap off with the heater on full and just make sure that everything is talked up and there is no air in the system now as you can feel previously now these lines will be warm to a touch but you can feel there is they're nice and soft and there is you can feel there is cool and inside them as opposed to before when you can feel the air pockets inside and once you've done this a couple times now if you are having a little trouble second time around you still notice there is air in the system you go back a third time I just to make sure now thank you for watching my tutorial video if you have any comments or questions please don't hesitate to post them below also please subscribe to my channel for further tutorial videos as well as rate this video and if I didn't mention earlier I'm also using a new camera so let me know what your new thoughts are on the the new video camera I have for my channel thank you

Channel: 4DIYers

Views: 91,094

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Id: IZoTgfgDUfY

Length: 6min 27sec (387 seconds)

Published: Fri Nov 15 2013