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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 10-14-2011, 07:17 PM   #1
shata
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Cooling System Maintenance EVERY 60K!

I just thought id point this out to people that haven't had this car very long, Take a look at it if your before or slightly past 60k (interval). Most likely it wasn't done.

I learned the hard way I only replaced the pump about 4-5 months ago or roughly 152k im at 157k now and my system has sprung leak today. Sigh...

Ordering ECS Cooling Maintenance Kit - Level 3 soon and taking weekend to do it right. When bmw says something needs to be done, It be wise to have it done trust me.

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Old 10-14-2011, 08:12 PM   #2
05graysport
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or you could have done something between 60k and the 92k extra miles put on after
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Old 10-14-2011, 08:17 PM   #3
bmw335ion18s
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Mine exploded at 49k. Yup, 49k.
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Old 10-14-2011, 08:28 PM   #4
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Looks like the same picture as my car, last week, at 187k. The radiator sprung a pretty bad leak. Turned out the end of the pipe from the radiator to the upper radiator hose was literally disintegrating. It fell apart in my fingers after I took it apart. New radiator was $150 from Pelican Parts.
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Old 10-14-2011, 08:55 PM   #5
shata
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Ya its freakin toast, I noticed it week ago when Coolant light came on in morning...im like wtf well after another week this happend today. (Topped off with 32oz of coolant mix) Gona try push another 2 weeks out of it so I can take it to shop but I dont have spare cash for 1000$ repair.
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Old 10-14-2011, 08:58 PM   #6
shata
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Mine exploded at 49k. Yup, 49k.
Wow 49k... thats terrible.
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Old 10-14-2011, 09:18 PM   #7
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you guys are lucky. our 328 cooling system was damaged during assembly at the factory causing the lower half of the radiator to have no flow. it clogged over time and even with having the system flushed what ended up happening was a combo of thermostat failing and overflow tank breaking and massive engine overheat...it all happened in a matter of seconds.
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Old 10-14-2011, 09:21 PM   #8
shata
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Thats pretty freaking bad man, im sorry hope bmw covered that repair otherwise the car is pretty much totaled at that point.
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Old 10-14-2011, 09:29 PM   #9
Sanchjer
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Originally Posted by shata View Post
Ya its freakin toast, I noticed it week ago when Coolant light came on in morning...im like wtf well after another week this happend today. (Topped off with 32oz of coolant mix) Gona try push another 2 weeks out of it so I can take it to shop but I dont have spare cash for 1000$ repair.
Do it yourself man. It isn't hard.

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Old 10-14-2011, 09:43 PM   #10
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Originally Posted by shata View Post
Ya its freakin toast, I noticed it week ago when Coolant light came on in morning...im like wtf well after another week this happend today. (Topped off with 32oz of coolant mix) Gona try push another 2 weeks out of it so I can take it to shop but I dont have spare cash for 1000$ repair.
My coolant light popped on and off like 4 times in 2-3 days then stopped. Does that pose a problem or do I actually just need to put coolant in? And I was told cooling system maintenance was $300-$400 not $1000.
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Old 10-14-2011, 09:49 PM   #11
shata
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Ya if it comes on it means its low, It will only pop normally when car is cold in morning. In morning before you start it open it up and add 50/50 mix of bmw coolant (not any other brand, go to stealership and get it). Then fill it till the float is at the point like on little diagram.
Well its 640$ for parts Complete system from hoses to radiator...everything. Then labor I know guy that charges me 60$/hr (GM master mechanic) So im estimating 1k roughly. I cant chance it doing it myself if I don't have my car for work im screwed.

The Cooling system maintenance kits are sold in different levels 1-3. Given people don't take care of their cars and never service nothing im going 3 but if you know previous owner did their stuff then maybe you only need 1 or 2.
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Old 10-14-2011, 11:28 PM   #12
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ecs's cooling overhaul kits have cheap mtc parts in some of them and isn't a real cooling overhaul... a real cooling overhaul is a CO from getbmwparts.com and if your really good you will get a stewart emp on top of that and your set.

shata maybe try changing your rims and your cooling system won't fail so much
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Old 10-14-2011, 11:57 PM   #13
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Originally Posted by tonykim View Post
you guys are lucky. our 328 cooling system was damaged during assembly at the factory causing the lower half of the radiator to have no flow. it clogged over time and even with having the system flushed what ended up happening was a combo of thermostat failing and overflow tank breaking and massive engine overheat...it all happened in a matter of seconds.
How did you know that is a problem from the factory?
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Old 10-15-2011, 08:59 AM   #14
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when I took it apart there was a piece of plastic missing from the quick connect male end. as I dug through the hardened deposits a layer at a time I reached the bypass valve and found the missing piece of plastic mechanically jammed between the wall and the spring on the bypass valve holding it in place. the overflow tank had never been out of the car nor the cooling system disassembled. the dealer verified that through the service records. they also did not detect the issue nor the formation of hardening deposits in the bottom flowpath of the two pass radiator when they flushed the system a few years earlier. my guess is the nipple had a flaw and the force applied during assembly broke it.
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Old 10-15-2011, 09:03 AM   #15
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and no bmw said too bad so sad. the engine got hot enough that it smoked the oil in the lifters. it was the final straw for us of a long list of premature failures even though we had been super diligent with maintenance. so we parked it in the driveway and it sat for over a year as a yard ornament. then i pulled everything down replaced all the cooling system parts, filled it with water, changed the oil, put a pint of magic mystery oil with the castrol synth, and fired it up. no leaks, no overheat, but the lifters clacked for about 25 minutes and one by one went quiet. except now I have a few that make noise on cold start up and when it's fully warm the engine is a little louder than it should be. but amazingly it uses no oil and no coolant, gets 24 mpg, and on we go. i figure i will drive it until it explodes. so far 10k miles. Hail Mary and thanks bmw for not helping out.
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Old 10-15-2011, 10:22 AM   #16
celt
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Since the cooling system is failure-prone I would avoid after-market parts. Try getbmwparts.com - prices are good and service is excellent.
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Old 10-15-2011, 10:22 AM   #17
shata
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Originally Posted by steven747 View Post
ecs's cooling overhaul kits have cheap mtc parts in some of them and isn't a real cooling overhaul... a real cooling overhaul is a CO from getbmwparts.com and if your really good you will get a stewart emp on top of that and your set.

shata maybe try changing your rims and your cooling system won't fail so much
Change my rims? How is that gona make a difference. When I replaced the pump few months back it was cause the Bearing shattered in pump which broke the pully also.
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Last edited by shata; 10-15-2011 at 10:33 AM.
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Old 10-16-2011, 01:12 AM   #18
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Coolant systems suck ass in bmw's I've done 2 complete overhauls an extra coolant tank as well but easy as 123 to DIY, and 1000? That's ridiculous
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Old 10-16-2011, 01:19 AM   #19
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my expansion tank has gone out twice FML the first time it cracked, i replaced it, the second exploded and took the belts out... :[
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Old 10-16-2011, 06:13 AM   #20
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So you did something and following that the car broke. Now you want everyone to follow your foot steps ? People would be better off going in the opposite direction.
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