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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, Jun-03-2012, 07:36:50 PM   #61
writersblock
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Just did this and thanks for the DIY. It helped a lot. I did, however, depart from the DIY in two ways:

1) I have an air compressor, so instead of using the Shop Vac, I removed the bleed screw and used a rubber nozzle blow gun on 25 psi. Still made a mess, but it got a ton of fluid out of the system.

2) I used a brake fluid extractor and snaked the hose into the temp sensor bung. It probably yielded and 10 oz of fluid.

Justin
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Old Fri, Jun-08-2012, 07:38:38 PM   #62
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Default Re: Coolant Flush DIY - Easy Method

Forgive my ignorance, but is there a reason not to use the shop vac to suck the coolant from the temp sensor opening?
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Old Tue, Jun-26-2012, 12:52:28 AM   #63
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Default Re: Coolant Flush DIY - Easy Method

I performed the coolant flush this past weekend for the first time. Previous flushes were done by an indy shop. But I have done this several times on my son's 530i and so I thought I would give it a shot. Overall, it was indeed a PITA. The following are some things I would do differently next time.

1. Remove the passenger front tire. It provides easier access to reach the block drain. Since the car was already up on jacks I just dealt with it.
2. After pulling the temp. sensor from the hose and letting the coolant drain, I spent a "bit of time" removing the lower hose and to my surprise not much coolant at all came out. I would skip this part next time.
3. After unbolting the canister, use some wire or string to tie it off to one side so it doesn't keep falling back in place.
4. Spend the time to research the right combination of rachets and extensions. I spent way too much time on this part but just wanted to use what I had in my arsenal, which was not adequate but I managed.
4. Have a replacement block drain bolt washer handy. When I was screwing the bolt back in I dropped the bolt and the washer went somewhere. Luckily I found the bolt and had an extra washer.

I'm glad I won't have to do this job again for several years.
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Old Tue, Jun-26-2012, 05:14:37 PM   #64
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Default Re: Coolant Flush DIY - Easy Method

I have a question per the write-up; instead of using a shop vac to "flush" out the remaining coolant, would it be possible to run some distilled water through that location to help it filter everything else out?
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Old Sun, Jul-29-2012, 05:07:53 AM   #65
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Default Re: Coolant Flush DIY - Easy Method

Thx, nice writeup.
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Old Thu, Feb-21-2013, 02:17:54 AM   #66
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Default Re: Coolant Flush DIY - Easy Method

Don't need to remove the canister but the coolant will spray more. Then I just cupped my hand and blew with my mouth into the expansion tank. I have lots of things that suck...nothing that blows. Lol
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Old Thu, Feb-21-2013, 02:25:00 AM   #67
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Rather than drain the block, I just drain coolant from the temperature sensor twice as often.

The coolant is well mixed, and I find it easier doing it more often since I don't have to deal with the block drain.

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Old Tue, Sep-09-2014, 04:09:40 PM   #68
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Default Re: Coolant Flush DIY - Easy Method

Quote:
Originally Posted by bigjae1976 View Post
Don't need to remove the canister but the coolant will spray more. Then I just cupped my hand and blew with my mouth into the expansion tank. I have lots of things that suck...nothing that blows. Lol
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Old Sat, Oct-18-2014, 02:15:29 PM   #69
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Default Re: Coolant Flush DIY - Easy Method

Hi All...

Its DIY time for coolant. Can anyone please help me with all the pictures that listed here for this DIY thread. For some reason I cant see them...They just say click and discover Imageshack.

Thanks in advance....Jeremy



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Originally Posted by TRACK-CZAR View Post
Like many others, I have been searching for a comprehensive DIY that covers the coolant flush procedure required for the Inspection II service. Without a definitive DIY, I left this as my last item. Despite finding the various dead links in the forum and the considerable discussion over the difficulty of removing the lower radiator hose, I nonetheless moved forward, taking pictures along the way, in hopes of creating a single DIY for others to follow.

I am pleased to report that this procedure was much easier than I imagined and I believe I have found a way to perform a complete flush without removing the lower radiator hose.

EDIT: Thanks goes to Function7 for posting his pictures on another thread and providing some basic information that helped me get through this.

So here goes:

1. Place the car on jacks or ramps. (Search the forum for various methods on this)

2. Then remove the front splash shield. Mine had 6 bolts holding it on. Nothing difficult here. It just comes right out.


3.Up top, remove the 4 plastic retainers for the air inlet piping.


4. Use either dykes or a thin flat screwdriver to pull up on the center pin, then remove the entire retainer.






5.Here is the piece out with the 4 retainers:


6. Next remove the intermediate duct elbow. No screws or retainers here.


7. Just pull straight up


8. Now you can see the bleed valve on the upper radiator, more on that later:


9. Next, we need to remove the passenger side fan shroud. There are 2 retainers holding this piece in and they are slightly larger than the first 4 holding th air duct. The first one is dead center on top.


10. The second is down on the passenger side:


11. Once the 2 retainers are out, this piece pulls straight up. Note the tab on the bottom...when replacing this piece later, be sure to put that back in its correct holder (easy to see)


12. Now if you look down, you can easily see the lower coolant hose. An electrical connection is hooked to the top of the hose for the temp sending unit.


13. Pinch the metal wire and remove the connector.
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Old Mon, Dec-29-2014, 02:28:07 PM   #70
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Default Re: Coolant Flush DIY - Easy Method

XLNLIFE go to this DIY by bimmerfan08 for an excellent description with many photos that cover the same steps for removing the fan shrouds, etc: http://www.m3forum.net/m3forum/showt...fan+clutch+DIY
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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)