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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 01-13-2009, 07:06 PM   #41
jrcarter_2000
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can't get the #@*& bottom hoses disconnected from the expansion tank to get the thing to lift out
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Old 01-13-2009, 08:16 PM   #42
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ok got the tank out BUT the connection with the spring at the bottom was chipped and I can't get the cap on the top of the spring to click back on
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Old 01-15-2009, 12:03 AM   #43
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you probably broke the thermostat

Dude, I just received a new thermostat and that's the only piece that you'll need to change. GIven your description I think that if you replace the thermostat you'll be ok.
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Old 01-15-2009, 12:37 AM   #44
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ok got the tank out BUT the connection with the spring at the bottom was chipped and I can't get the cap on the top of the spring to click back on
You mean the grooves on the lower hose where the spring slides through are chipped and can't secure the expansion tank on them>?
Did you manage to fix this issue?
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Old 01-15-2009, 12:43 AM   #45
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Paraklas, my bad. I misunderstood. I was refering to the thermostat housing, which was my problem....that was fixed by swapping it. When it comes to the hose, I did not experience that issue at all...
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Old 01-25-2009, 02:43 PM   #46
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Lots of good pics! I haven't driven my '99 323i in awhile because I noticed it overheating a few weeks back w/ plenty of coolant. So I think I'll replace the thermostat and bleed the coolant system before trying anything else... Hope it works!
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Old 01-25-2009, 08:32 PM   #47
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Question coolant leaking!!

I been changing the coolant evry 4-5 days....seems like a big problem.cant figure it out.its been 2 weeks.what you guys think the problem could b??thanks
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Old 01-25-2009, 10:06 PM   #48
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One thing I always wonder, why the automatic has a mechanical fan? Meanwhile the manual has an electric fan. Has anyone converted from mechanical to electric successfully?
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Old 01-26-2009, 01:38 AM   #49
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I been changing the coolant evry 4-5 days....seems like a big problem.cant figure it out.its been 2 weeks.what you guys think the problem could b??thanks
Check for visible leaks obviously, also check the dipstick for any mayo like substance

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One thing I always wonder, why the automatic has a mechanical fan? Meanwhile the manual has an electric fan. Has anyone converted from mechanical to electric successfully?
No idea why but you can convert to electric, it's been done several times, there's even a conversion kit iirc selling in bimmerworld?
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Old 01-26-2009, 01:51 PM   #50
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Quote:
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No idea why but you can convert to electric, it's been done several times, there's even a conversion kit iirc selling in bimmerworld?
I checked in bimmerworld, their isn't any conversion kit in the cooling section. If you have the direct link, please post it, thanks.
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Old 01-26-2009, 07:38 PM   #51
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After doing a little looking under the hood I found out why my car was over heating. Can anyone tell me where I can buy this part? Also, I went ahead and took the two quick release U hooks off but still can't figure out how to pop it off. Any input would be greatly appreciated!

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Old 01-26-2009, 07:52 PM   #52
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ust replace the upper rad hose. DOnt about replacing only that part
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Old 01-26-2009, 08:15 PM   #53
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ust replace the upper rad hose. DOnt about replacing only that part
K... That didn't really make sense, but I was able to find the part # for the upper radiator hose. I'll call around and see if any auto parts stores around here can get me one.
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Old 01-26-2009, 08:18 PM   #54
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Try ECS Tuning..

www.ecstuning.com - they have parts at good prices...good luck.
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Old 01-26-2009, 08:21 PM   #55
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Cool, thanks!

And I read that the upper radiator hose is a common fail point on the E46. Is it the same will all the radiator hoses?
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Old 01-27-2009, 04:27 AM   #56
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After doing a little looking under the hood I found out why my car was over heating. Can anyone tell me where I can buy this part? Also, I went ahead and took the two quick release U hooks off but still can't figure out how to pop it off. Any input would be greatly appreciated!

Spray some WD40 at the connection of the plastic hose to the radiator, let it sit for a few minutes and then gently pull the broken plastic out.
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Old 01-27-2009, 03:45 PM   #57
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Thanks paraklas!

I'm going to go ahead and order everything I need for a cooling system overhaul. But is it really necessary to get a new radiator cap (P/N 17111742231)?

Also, I'm trying to think of any other parts that I should go ahead and order while I'm at it that are prone to fail or need to be replaced regularly... Like a new micro carbon filter (don't know when it was replaced last), or some Liqui Moly for my next oil change (dunno if it's worth the $15 or not)... Any input would be helpful. Thanks guys!

Last edited by jpainter187; 01-27-2009 at 03:55 PM.
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Old 02-05-2009, 06:53 PM   #58
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I got the upper radiator hose along with all the other coolant system parts delivered today. Since I'm short on time I only replaced the upper radiator hose to see if that fixed the overheating problem, which it did. When I get a chance I'm going to change all the other coolant parts, change the oil, etc. etc. I don't plan to drive the car until I can get all of this done...

But one thing that I noticed as soon as I started the car to let it warm up was a distinct "thunking" noise. I got my head closer to the engine to listen and it sounds like its coming somewhere on the left side of the engine, underneath the oil filler cap. Like I said before, I caught the overheating problem immediately and slowly drove about 30 seconds until I could pull into a parking lot. Was that short drive 30 seconds too long??? And by the description of the noise does it sound like I f*cked something else up?
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Old 02-16-2009, 04:39 PM   #59
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Mini update, after 3000 miles, the WP is as quiet as day 1, no ticking or anything unusual as it was reported in some other thread
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Old 02-17-2009, 12:58 PM   #60
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Nice writeup. I just flushed my system, replaced my pulleys and belts. I am due for a new stat and water pump also. 111k on the clock!
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