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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 03-18-2016, 09:30 PM   #1
mouseclutch1
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Over heating help

Hello forum great resource and good group of people that have a passion for e46 cars . i have read some of the stuff and is very informative great stuff. Well i have a 2001 325i and i am having trouble with my car over heating i jacked it up and took a look and found that i have no drain plug filled it with water and it doesnt drain from the draining point ii have added radiator sealant 3 times the water seems to be pouring from under the pully belts any help on way this may be i know thermostat sometimes fails but here are some pics any suggestion's.
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Old 03-18-2016, 09:34 PM   #2
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Old 03-18-2016, 10:11 PM   #3
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Hi, welcome to the forums class of 2016.

Please read this from Mango: http://e46cooling.blogspot.com/2014/...rlhttpwww.html

You'll want to replace the whole cooling system, especially since you've contaminated/gunked things up with your leak-stop.
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Old 03-19-2016, 02:15 AM   #4
hatetolovee46
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Water pump or thermostat, identify water pump pully, is it leaking there? then it's water pump, identify thermistat housing(two hoses go in on front of engine is plastic housing that bolts to engine) is it leaking there? thermistat

I'm not a fan of "Replace whole cooling system" mentality unless you have an m, cooling system failures don't damage cars, driving them on overheats does. I don't replace things that aren't broken or for sure worn(tires, old fluid ect).
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Old 03-19-2016, 07:51 AM   #5
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After adding that gunk, flush the car at least a couple of times with fresh water...then with distilled and drain again...and then with the proper fluid.

I'd replace both therm and wp and probably do a bit more, too...since you're there anyway. Good time to do pulleys, belts, and the ET too. I just did mine and also replaced all the 0-rings in the hoses...since the hoses were only 3-4 years old they didn't need replacing.
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Old 03-19-2016, 07:56 AM   #6
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Quote:
Originally Posted by hatetolovee46 View Post

I'm not a fan of "Replace whole cooling system" mentality unless you have an m, cooling system failures don't damage cars, driving them on overheats does. I don't replace things that aren't broken or for sure worn(tires, old fluid ect).
True, but what about having a neglected system fail on you while you're on the highway hundreds of miles from any place that has replacement parts or an area with no phone service? I do a ton of road trips and being stranded like that is not part of the agenda
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Old 03-19-2016, 06:29 PM   #7
mouseclutch1
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Thats great info i will look in too it but aside from the special tool that removes the fan can i do it without it or can i rent it ?? I know there is sealers like gasket seal and stuff like that as far as the flushing does that mean watet bottle first the tap water ??
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Old 03-19-2016, 06:30 PM   #8
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Jajaja yeah im getting into preventative maintenance too but really i use the car for going out on weekend's and cruising but on accasion visit family in Bakersfield. Im in northern cali bay area
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Old 03-20-2016, 12:18 AM   #9
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I've never found the correct size fan clutch tool as a loaner at the big parts stores. They're not expensive, you should probably buy one.
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Old 03-20-2016, 12:34 AM   #10
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You must have used a lot of stop leak!

What if that hole where his radiator plug was starts leaking???

I'm at a loss for suggestions other than replace it all... Unless you have multiple cars and not worried about overheating/breaking down.
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