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Old 02-24-2014, 12:53 PM   #1
hummer
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Expansion Tank Doomsday!

Told everyone here that I would let you all know when my tank failed. Finally happened last week with a crack on the corner just below the power steering lines. Drove it for two weeks like this with some dripping and refilling. So, 12 years, 11 mos, 199K miles. Radiator still looks OK but it will be replaced along with the original upper and lower hoses and a non-fuctional heat control valve. The only cooling system parts replaced up til now are a water pump (Stewart) at 120K and I'm on the 4rth thermostat. They ranged from the first failure at 30K to being replaced with the pump at 90K. The third failure was 65K.
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Old 02-24-2014, 12:55 PM   #2
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how did your t-stats fail? stuck open?
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Old 02-24-2014, 01:38 PM   #3
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SOB couldn't make it to an even 200K, huh.
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Old 02-24-2014, 02:05 PM   #4
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Quote:
Originally Posted by hummer View Post
Told everyone here that I would let you all know when my tank failed. Finally happened last week with a crack on the corner just below the power steering lines. Drove it for two weeks like this with some dripping and refilling. So, 12 years, 11 mos, 199K miles. Radiator still looks OK but it will be replaced along with the original upper and lower hoses and a non-fuctional heat control valve. The only cooling system parts replaced up til now are a water pump (Stewart) at 120K and I'm on the 4rth thermostat. They ranged from the first failure at 30K to being replaced with the pump at 90K. The third failure was 65K.
With all the talk about cooling system replacement, and your longevity here on this forum, I am a bit curious as to why you haven't changed out these items long ago as a PM?
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Old 02-24-2014, 02:13 PM   #5
white46
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Originally Posted by KaktusJaque View Post
With all the talk about cooling system replacement, and your longevity here on this forum, I am a bit curious as to why you havenít changed out these items long ago?
Guess because it hasn't failed yet until.
OP sounds like he is mechanically inclined.
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Old 02-24-2014, 03:00 PM   #6
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Why did it take two weeks to replace it before it failed?


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Old 02-25-2014, 08:31 AM   #7
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Only 199K? I knew those things were just a ticking time bomb!
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Old 02-25-2014, 09:50 AM   #8
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Only 199K? I knew those things were just a ticking time bomb!
Sample size: 1
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Old 02-25-2014, 10:11 AM   #9
Manolito
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You got your money's worth out of that radiator and expansion tank. Those of us who have wives, daughters, and girlfriends driving our cars don't dare push the limits like that.
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Old 02-25-2014, 11:12 AM   #10
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Those of us who have wives, daughters, and girlfriends driving our cars don't dare push the limits like that.
I think this is an excellent point. We are more in tune to our cars so sometimes pushing limits to experiment can be fun, but if you are maintaining a loved one's car who A-B's it, I wouldn't play around.
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Old 02-25-2014, 11:54 AM   #11
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my ET just failed at 66k original miles on our 2006 325ci, dealership charged $593 to do ET,transmission thermostat,oil change, chnge and fill coolant, and new upper radiator hose. They said valve cover and oil pan gasket are also beginning to show signs of seepage, so that will be next...Gggg
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Old 02-25-2014, 12:00 PM   #12
hummer
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Originally Posted by KaktusJaque View Post
With all the talk about cooling system replacement, and your longevity here on this forum, I am a bit curious as to why you haven't changed out these items long ago as a PM?
Because I don't subscribe to the "sky is falling" approach to car maintenance! Some things I do do based on miles or age. But, I don't replace parts simply because someone else may experience a failure and report it here on the WEB. And I don't like throwing money away for no good reason. I troubleshoot the problems and replace parts as needed to fix the issue. I'm the only one that drives the car and don't have to listen to guff from anyone but me.

It started leaking a few weeks ago and I drove it that way adding a little coolant every other day. Had a warm day last weekend so I went investigating after replacing the FSR and found the crack in the tank and the cold heater hoses.

Thermostat always failing closed is another wives tale! My thermostats have failed both ways. The first one was running cold then shot into the red. The others were sticking open.
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Old 02-25-2014, 12:02 PM   #13
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Originally Posted by KaktusJaque View Post
With all the talk about cooling system replacement, and your longevity here on this forum, I am a bit curious as to why you haven't changed out these items long ago as a PM?
Evidence would seem to suggest PM is a waste of time and money. I have never had a coolant failure that caused me any more inconvenience than the inconvenience of replacing parts that don't need replacing. At the end of the day your car is off the road while the work gets done.
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Old 02-25-2014, 12:34 PM   #14
WDE46
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Originally Posted by hummer View Post
Because I don't subscribe to the "sky is falling" approach to car maintenance! Some things I do do based on miles or age. But, I don't replace parts simply because someone else may experience a failure and report it here on the WEB. And I don't like throwing money away for no good reason. I troubleshoot the problems and replace parts as needed to fix the issue. I'm the only one that drives the car and don't have to listen to guff from anyone but me.

It started leaking a few weeks ago and I drove it that way adding a little coolant every other day. Had a warm day last weekend so I went investigating after replacing the FSR and found the crack in the tank and the cold heater hoses.

Thermostat always failing closed is another wives tale! My thermostats have failed both ways. The first one was running cold then shot into the red. The others were sticking open.
I don't think I've even heard of anyone's thermostat on their E46 failing closed. Nobody reports that.

"someone else" is hundreds (maybe thousands) of people on these forums reporting ET pops and overheats as a result.

What is reported is ET failures starting around 100,000 miles and going up from there. The smart thing to do is to replace it around then so you don't risk a catastrophic failure causing an overheat. That will cost you many times more than a simple tank or overhaul. It's rational and far from a "sky is falling" attitude.

I await your headgasket thread or the "stranded" thread when your FP goes out
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Old 02-25-2014, 12:36 PM   #15
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Evidence would seem to suggest PM is a waste of time and money. I have never had a coolant failure that caused me any more inconvenience than the inconvenience of replacing parts that don't need replacing. At the end of the day your car is off the road while the work gets done.
Have you not seen the large quantity of posters who write about their experience with cooling parts failures? They overheat and ruin the head gasket and warp the head. Not worth it.
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Old 02-25-2014, 12:40 PM   #16
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Thread closed. OP got his experience out in the open. Not letting this thread turn into another cooling system war.
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