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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sun, Jul-25-2010, 05:24:41 PM   #21
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Great write up! Thanks again. I'm sure this will come in use in the future for me.
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Old Sun, Jul-25-2010, 06:09:17 PM   #22
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Quote:
Originally Posted by skelzy View Post
Good job..... The only part of your process that scares me is the shop vac blowing into the coolant resevior. I see the shop vac hose fits nicely over the cap but your essentially blowing debris back into your resevior. I would try rigging my air compressor first of something that wont contaminate the coolant... Otherwise, kudos for being creative....
I agree. I searched for my air nozzle for 30 minutes before giving up and going with the vac. You are correct that in saying that before you use your vac for this, be sure to clean the $#%! out of it.
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Old Sun, Jul-25-2010, 06:34:43 PM   #23
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Originally Posted by fergraz View Post
Thanks! Very good DIY but some pictures are missing at this moment.
I just checked.....I see all the pics I put in there. There are no pics from about #30 on, mostly just putting stuff back on.
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Old Mon, Jul-26-2010, 03:29:40 AM   #24
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Default Did this today...

First off, thank you for such a thorough DIY! I've been thinking about doing a coolant flush for a while now. Read all the DIYs and the horror stories about how messy it is and how you'll get a coolant bath before it's all done.

I used TRACK-CZAR's and Function7's method as described here. I will vouch that it IS indeed messy. I just can't help to think that either the BMW techs that service M3's accomplish this another way (suction maybe?) or not. Maybe it's just the way the coolant system had to be designed. I've worked on many cars doing all sorts of jobs but this seems to be the most bizarre to me. But I digress...

I'd like to add a few points to this DIY that might be helpful. It might be a good idea to wrap the belts with some sort of plastic. The belts will still get a little coolant on them but it's always been best practice to prevent it. Since I just replaced the belts I wanted to protect them (looking straight down on where the temp sensor goes, it's been removed in this pic):



I also placed some towels around the engine bay when I did the blower method. The blower worked GREAT by the way. A lot more coolant came out then I really thought would. Here is an action shot for you guys:



And here is a video. I took this video after a good 3-4 minutes of blowing. Much more came out when I first started:

http://www.youtube.com/watch?v=KQYIQlghfpk

Also, on my '02, the VANOS cannister bolt is 10mm and the engine bolt is 13mm. The VANOS clamp was a little difficult to separate from the canister itself. There is a rubber lining/sleeve around the canister that kind of fused itself to the clamp. I had to CAREFULLY use a pry bar and gently release it from one side of the clamp:



Another thing, I dropped my oil cooler to prevent coolant from splashing any more than it had to. it's very simple to drop it and move it out of the way while the oil lines are still attached:



And yes, I went bare concrete garage floor. lol! But I keep my garage in such a way that I simply hosed off what didn't get caught, which wasn't much really.

Lastly, I hosed the engine down before starting it up as I didn't want coolant flung all over the garage by the fan. It made for a little extra work but kept things relatively tidy.

- Brian
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Old Mon, Jul-26-2010, 05:14:27 AM   #25
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is it that difficult to remove the lower rad hose? with this method the coolant is splashing vertically up into the engine area.
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Old Mon, Jul-26-2010, 11:47:08 AM   #26
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I just checked.....I see all the pics I put in there. There are no pics from about #30 on, mostly just putting stuff back on.
Sorry, but I see this on my browser:





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Old Mon, Jul-26-2010, 01:33:23 PM   #27
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Well done sir!

I too just drained the fluid through the temp sensor rather than removing the lower hose connection.
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Old Tue, Jul-27-2010, 12:51:43 AM   #28
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Great write up and thanks! But one question. On step 35 you have it written -

35. I opened and closed the bleed valve a few times. Ultimately, I stopped seeing fluid come out.

Don't you mean that you opened and closed it until all the "air" got out? I would think this would be a bleed valve to let air out. I've never done this, so I'm just asking for my own good.

Thanks again for the great write up!
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Old Tue, Jul-27-2010, 05:36:17 AM   #29
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this thread is so helpful, i'll be checking back here in a few months when it's time to do my coolant flush.
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Old Tue, Jul-27-2010, 06:11:33 AM   #30
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Quote:
Originally Posted by Monsoon View Post
Great write up and thanks! But one question. On step 35 you have it written -

35. I opened and closed the bleed valve a few times. Ultimately, I stopped seeing fluid come out.

Don't you mean that you opened and closed it until all the "air" got out? I would think this would be a bleed valve to let air out. I've never done this, so I'm just asking for my own good.

Thanks again for the great write up!
I left the bleeder open just enough until the bubbles were gone. I'm sure that's what he meant. I also had to add about another 1/2 gallon of distilled water. Makes me wish I had two gallons of coolant to get an even 50/50 mix. I'm sure it's fine though.
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Discussing Coolant Flush DIY - Easy Method in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)