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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 10-10-2012, 01:04 PM
reyna325i reyna325i is offline
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Exclamation white smoke plume. now ac is out

Hey guys i recently purchased a 2003 325i.. I have 68,000 miles on it.. One day while i was adjusting my aftermarket speakers in the trunk something went really wrong.. The car was on and idling for I'd say about 15 minutes. I had forgot it was even on, but out of nowhere the car started making a kind of hissing noise and then a plume of white smoke but didn't really seem like smoke comes from what appeared to be under the car. Maybe from under the hood. It scared the hell out of me and i ran and shut the car off. Also before this happened the low coolant level light would come on and of periodically. Well once i got enough courage to start my car back up it seemed to run fine. All except th air conditioning, it no longer works.. Just blows warm air and makes hissing sound when ac is switched on. Thinking the noise and plume of white smoke(fog) was all my freon escaping at one in one big leak. Is this possible? What the heck was that cloud and noise while it was releasing it? Low coolant light no longer comes on. Maybe a coincidence. Coolant level good
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  #2  
Old 10-10-2012, 01:10 PM
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MalibuMafiaV MalibuMafiaV is offline
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Quote:
Originally Posted by reyna325i View Post
Hey guys i recently purchased a 2003 325i.. I have 68,000 miles on it.. One day while i was adjusting my aftermarket speakers in the trunk something went really wrong.. The car was on and idling for I'd say about 15 minutes. I had forgot it was even on, but out of nowhere the car started making a kind of hissing noise and then a plume of white smoke but didn't really seem like smoke comes from what appeared to be under the car. Maybe from under the hood. It scared the hell out of me and i ran and shut the car off. Also before this happened the low coolant level light would come on and of periodically. Well once i got enough courage to start my car back up it seemed to run fine. All except th air conditioning, it no longer works.. Just blows warm air and makes hissing sound when ac is switched on. Thinking the noise and plume of white smoke(fog) was all my freon escaping at one in one big leak. Is this possible? What the heck was that cloud and noise while it was releasing it? Low coolant light no longer comes on. Maybe a coincidence. Coolant level good
If your low coolant light comes on some times either your sensor is broken or you have a coolant leak. As for the AC making a hissing noise and not working sounds like you have a leak in your AC system some where releasing freon into the atmosphere.
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  #3  
Old 10-10-2012, 02:17 PM
reyna325i reyna325i is offline
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Yeah i had figured my sensor was broken. Just weird that the low coolant light no longer comes on after my experience. So do you think that was my freon escaping that caused the cloud since my ac no longer worked afterwards? What do i need to fix.. Compressor? Hose leak?
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  #4  
Old 10-10-2012, 02:19 PM
reyna325i reyna325i is offline
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Whats weird is it all released at once in one big cloud along with a sort of busted hose sound?
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  #5  
Old 10-10-2012, 02:52 PM
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MalibuMafiaV MalibuMafiaV is offline
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Quote:
Originally Posted by reyna325i View Post
Yeah i had figured my sensor was broken. Just weird that the low coolant light no longer comes on after my experience. So do you think that was my freon escaping that caused the cloud since my ac no longer worked afterwards? What do i need to fix.. Compressor? Hose leak?
You can get your AC system tested for leaks for fairly cheap at any indy that does AC repair. Do you hear or see the compressor go on when you turn the AC on? look under the hood and see.
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BMW 2006 M5 - REALLY LOUD
Audi S4 2000 Stage 3 - Dat turbo spool
BMW 2000 3-series - Supercharged Because race car SOLD
Maserati 2004 M128 GT - HREs/tint/straight piped SOLD
BMW 2006 M3 - stock - SOLD
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  #6  
Old 10-10-2012, 03:25 PM
reyna325i reyna325i is offline
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Yes i can hear it when i press ac button. It makes that sort of hissing through the vents. Does this mean my compressor is good but all my freon has escaped through a leak so therefore it cannot function properly
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  #7  
Old 10-10-2012, 03:44 PM
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Quote:
Originally Posted by reyna325i View Post
Yes i can hear it when i press ac button. It makes that sort of hissing through the vents. Does this mean my compressor is good but all my freon has escaped through a leak so therefore it cannot function properly
Yup that's what it seems to be. One way to tell for sure is a leak test.
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Maserati 2004 M128 GT - HREs/tint/straight piped SOLD
BMW 2006 M3 - stock - SOLD

Last edited by MalibuMafiaV; 10-10-2012 at 04:56 PM.
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  #8  
Old 10-10-2012, 04:50 PM
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SJBimmer SJBimmer is offline
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Look at all hose connections first, then hoses, then compressor. When freon vents that fast it will carry the PAG oil with it, so look for the wet oily spot to find your leak.
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  #9  
Old 10-10-2012, 06:23 PM
reyna325i reyna325i is offline
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Cool thanks for the help. I just bought her so I'll be happy to find this is what it Is and not something major
Like blown head gasket and coolant in my cylinders
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