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Old 10-06-2010, 09:27 PM   #1
sl71333
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Join Date: Sep 2008
Location: New York
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My Ride: 2002 Dinan 3 E46
Coolant issue

I have a 2002 330ci with as of today 58,000 miles on it. For the past couple of months the coolant light has been on and off very often. I usually check it but if I am driving it will occasionally go off on its own. More recently, I have checked the coolant level more routinely and noticed that my car has been drinking coolant. I have plenty of clean oil in the car. This problem has been bugging me for a little while and I wanna know if anyone has had any similar issues.
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Old 10-06-2010, 09:41 PM   #2
dmax
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Very new here, you are, and even though I'm about to go to bed, I'll be nice and not say, "no, you're the first fanatic to have lost coolant."

We all have...thousands of threads...search, read...use advanced search, title search, coolant leaking, leak, cooling system overhaul, etc.

That's my prescription, btw, cooling system overhaul...about $300 in oem parts...about what, a day diy first time...lots of cussing (hide the kids)...lots and lots of money saved...some of that invested in tools....diys here for everything...any acronym I or anyone uses...search for, you'll figure it out...search 'abbreviations.'

Read before you do...read lots, read and watch vids (not that kind!)...until you're literally pulling your hair out, swearing at the dog and kids, hitting your car...pissed at the world...then...only then, should you actually work on your car.

Sorry...I'm beat!

Sorry, back real quick...keep coolant between min and max...use same color you had...use coolant as lube on et cap and filler neck...and most important...if temp rises above dead center, pull over, stop car, get towed wherever...or buy new headgasket/head or engine...your choice almost...$300 covers you pretty reliably for 4-5 years...the rest...$1000-$5000 installed by someone else...diy cost...$200-$2000 and hours and hours of work in areas you're not quite ready for yet.

Doug
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Last edited by dmax; 10-06-2010 at 09:45 PM.
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Old 10-06-2010, 09:53 PM   #3
BimmersGarage
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@sl71333

First, welcome to the forum. You have arrived at the right place for answers.

Second, listen to Doug's advice.

Lastly, my guess is you HAVE a hairline leak in your cooling system. With the recent crazy heatwave you've had up north... one or more of your cooling system components have failed. The system is pressurized, so you get this on & off again low coolant warning light. But, be reassured that your system is NOT self-healing. You should remove the splash guard/shield under your radiator and do a thorough inspection for tell tale signs of dry coolant residue and/or Leak(s).

Look closely at your Expansion Tank and Rad. hoses, for starters.
Good luck.


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Go to bed. Take a break... I see you on here ALL the time.
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Old 10-07-2010, 01:39 AM   #4
LiNk504
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i had a small leak like that too that i couldn't find for the life of me. finally found it when it turned into a larger leak and steam started pouring out of it. mine was the plastic peice with the bleeder cap on it, the part where the hose attaches to it cracked and separated causing the hose to pull away and creating a gap. if there is coolant around the front of your engine then yours might be in the same spot. i was told that that is a really common part of the cooling system to fail, and if that is bad then your ET will probably be close to failing soon too.
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