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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 02-15-2013, 12:31 PM
ttran118 ttran118 is offline
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Please help!!! Coolant issue, car overheating!!

So I was driving to work this morning and then I get a message on that navi screen saying my car is overheating, said to drive moderately so the car can cool down. 2 mins later, it said to stop and shut off my car because it was getting too hot. I was about 2 miles away from work. I had shut off the car, turned on the car, and made it to work. I called BMW and they told me not to drive it anymore etc etc. I opened the hood and the coolant tank, there was liquid surrounding that part. So i called my cousin who is a mechanic, told me to start by purchasing a new coolant tank and some antifreeze. So i buy the parts and my other cousin(not a mechanic but knows enough about cars) came and replaced it for me. He had warmed up the car and didnt see a leak or steam coming from anywhere. An hour later, i took my car and drove it to the mall which is only a mile away. Right after i started the car, the car started to idle pretty quick and kind of loud.

Can anyone let me know what the deal is?? Why is it idling now? It didn't idle before. I dont want to damage the engine the car more so im a little afraid to drive it home after work which i work about 15 mins away. DO you think i'll be fine?? My other cousin also said if i was to put some water in the tank temporary, I would of been fine and told me not to be so worried. I have a 2006 330xi, roughly 95k miles now.
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  #2  
Old 02-15-2013, 12:38 PM
Leekay07 Leekay07 is offline
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fuel pump failed. probably broke loose and the serpent belt is just spinning a free shaft
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Old 02-15-2013, 12:43 PM
ttran118 ttran118 is offline
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Quote:
Originally Posted by Leekay07 View Post
fuel pump failed. probably broke loose and the serpent belt is just spinning a free shaft
so what's that mean? will the idle part stop? i've had full warranty up until last June so i didnt have to do any repair work. i know lil about cars and its function.
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Old 02-15-2013, 12:49 PM
jburke4689 jburke4689 is offline
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The loud idle is probably the radiator cooling fan. If the car is hot or the water pump is bad that will come on full blast and seem like loud idle. Did your cousing bleed the cooling system after replacing the tank and coolant. If there is air in the system your car will overheat even after the tank is replaced.
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Old 02-15-2013, 12:50 PM
jburke4689 jburke4689 is offline
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Quote:
Originally Posted by Leekay07 View Post
fuel pump failed. probably broke loose and the serpent belt is just spinning a free shaft
Come on Leekay, the fuel pump is electric and in the fuel tank. There is no belt turning it.
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Old 02-15-2013, 12:52 PM
Leekay07 Leekay07 is offline
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LOL I meant coolant pump. I believe its mechanical.
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Old 02-15-2013, 12:57 PM
jburke4689 jburke4689 is offline
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The water pump is electric.
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Old 02-15-2013, 01:01 PM
Leekay07 Leekay07 is offline
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Then the pump is simply shot. "Sorry I don't have a 330. I thought only 2007+ was electric. My bad) N52 and N54

But yes the pump needs to be replaced. The symptoms your going through are the normal failing pump.

Mine said it was over heating 2 times before It finally stopped working. The pump on a 335 is 500 new on ebay from a BMW dealer so chances are its the same for the 330. Its also going to need coolant and a good time to change the thermostat.
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Old 02-15-2013, 01:02 PM
ttran118 ttran118 is offline
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Quote:
Originally Posted by jburke4689 View Post
The loud idle is probably the radiator cooling fan. If the car is hot or the water pump is bad that will come on full blast and seem like loud idle. Did your cousing bleed the cooling system after replacing the tank and coolant. If there is air in the system your car will overheat even after the tank is replaced.

What do you mean by bleeding it? He said he replaced it, made sure there was no leak or steam coming from it and that was it.
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  #10  
Old 02-15-2013, 01:03 PM
ttran118 ttran118 is offline
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Do you think I can drive it home without causing more damage to the engine? About 15 miles away..
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  #11  
Old 02-15-2013, 01:08 PM
Leekay07 Leekay07 is offline
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http://www.ebay.com/itm/BMW-OEM-E90-...68f6fa&vxp=mtr
Your pump is cheaper only $380

As for drive home. Get a toe truck its cheaper then the inevitable.
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Old 02-15-2013, 03:04 PM
ttran118 ttran118 is offline
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So I tried to drive home and it came up again.."overheating, stop car and shut it off". F me!! It was definitely not the coolant tank as fluids are all over it again. What a waste of $160ish from BMW!! I thought it was that and had to buy it as I cannot wait days for it to be shipped to me. I called AAA and signed up for real quick, gotta wait estimated 90 mins. What else can be wrong?? Hopefully not too much!
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Old 02-15-2013, 04:04 PM
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GarySL GarySL is offline
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Your water pump has failed. Get a tow & get it replaced (along with the thermostat). g/l
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Old 02-15-2013, 04:21 PM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by ttran118 View Post
So I was driving to work this morning and then I get a message on that navi screen saying my car is overheating, said to drive moderately so the car can cool down. 2 mins later, it said to stop and shut off my car because it was getting too hot. I was about 2 miles away from work. I had shut off the car, turned on the car, and made it to work. I called BMW and they told me not to drive it anymore etc etc. I opened the hood and the coolant tank, there was liquid surrounding that part. So i called my cousin who is a mechanic, told me to start by purchasing a new coolant tank and some antifreeze. So i buy the parts and my other cousin(not a mechanic but knows enough about cars) came and replaced it for me. He had warmed up the car and didnt see a leak or steam coming from anywhere. An hour later, i took my car and drove it to the mall which is only a mile away. Right after i started the car, the car started to idle pretty quick and kind of loud.

Can anyone let me know what the deal is?? Why is it idling now? It didn't idle before. I dont want to damage the engine the car more so im a little afraid to drive it home after work which i work about 15 mins away. DO you think i'll be fine?? My other cousin also said if i was to put some water in the tank temporary, I would of been fine and told me not to be so worried. I have a 2006 330xi, roughly 95k miles now.

Hey ttran, I got 2 startin' to smoke....gonna burn a hole in my jeans!

So here goes: Your friend the mechanic might not be all that familiar with cooling systems. On a BMW, in which nearly every function imaginable is monitored by computer, first stop's to plug a BMW proprietary code reader into the OBDII port t'see what's hot & what not.

Then, verify. Ain't that hard to determine if an electric water pump's bad - take a current draw reading for instance. Low? Maybe the impellers, if that's what BMW uses, have broken off & the shaft's spinning free, essentially no load.

Could be you gotta blockage. Water pump would be steamin' hard, trying to recirc max coolant - - max current draw t'spec.

"Wha?" you say. "What spec?"

Ain't in the owner's manual. Here is where you need a BMW mechanic with the resources and experience to quickly and correctly diagnose; repair.

Seek a reputable indy - Yelp will at minimum give you a direction. Maybe you know other BMW people where you are....or maybe a knowledgable Bimmerfest local can steer you straight.

Good luck! And please, DO post the resolution here!

.

Last edited by CALWATERBOY; 02-16-2013 at 07:30 AM.
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  #15  
Old 02-17-2013, 09:57 AM
ttran118 ttran118 is offline
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It ended up being the thermostat. I'm gonna have the water pump replaced too.
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  #16  
Old 02-17-2013, 04:14 PM
Leekay07 Leekay07 is offline
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Hey Ttran118 before you do the work I strongly recomend you change your oil filter housing gasket at the same time. It has a tendancy to start to seep around this time. its a $15 gasket and it needs the coolant to be dropped to replace it.
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  #17  
Old 02-17-2013, 04:21 PM
aleks001 aleks001 is offline
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Quote:
Originally Posted by ttran118 View Post
It ended up being the thermostat. I'm gonna have the water pump replaced too.
I doubt its the thermostat, because the thermostat on these fails open. 99% your water pump has died. If you get the car scanned it will probably tell you that the water pump is finished. While you're replacing the water pump, replace the thermostat as well.
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  #18  
Old 02-23-2013, 11:15 PM
sptt144 sptt144 is offline
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Who told you it was the T-stat? I've never seen coolant loss with a failed T-stat but have seen overheating. It is just an internal open/close valve like an EGR valve. Waterpumps and hoses however, fail most often and do cause coolant loss.
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