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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)

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 Yesterday, 06:06 AM
James "Pat" James "Pat" is offline
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Mein Auto: 2001 330ci
Service interval reset-is it possible to reset other things?

Good morning,

While I was trying to reset the service interval on my 2001 330ci, I wasn't doing it correctly initially.
I was pressing and releasing the appropriate button and noticing that as I was doing so, I was scrolling through other numbered functions of some kind.
I finally got it right and succeeded in the reset.
My concern is that: Is it possible that I could have reset anything that could cause my car to overheat?
I'm just trying to rule this out as a possible factor.
When I got home last night, my car dumped coolant on the garage floor after I turned it off.
I just changed the water pump, thermostat, and coolant about 2 weeks ago and have been driving the car back and forth and forth to work without any issues until now.
Sorry for the long post, just trying answer any questions anyone might have.

Thank you

Pat

Last edited by James "Pat"; Yesterday at 06:08 AM. Reason: punctuation
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  #2  
Old Yesterday, 06:10 AM
marcozandrini marcozandrini is offline
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No.


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  #3  
Old Yesterday, 06:10 AM
marcozandrini marcozandrini is offline
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Mein Auto:
Did you change the expansion tank?


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  #4  
Old Yesterday, 06:13 AM
James "Pat" James "Pat" is offline
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Mein Auto: 2001 330ci
No, it does appear to be empty.
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  #5  
Old Yesterday, 06:18 AM
marcozandrini marcozandrini is offline
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Mein Auto:
Of course it's empty! The tank is a reservoir. It's also the most likely culprit when an E46 loses coolant. How many miles on the car? A complete cooling system refresh is mandated by 100k miles.


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  #6  
Old Yesterday, 06:38 AM
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need4speed need4speed is offline
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No
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  #7  
Old Yesterday, 09:03 AM
James "Pat" James "Pat" is offline
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Mein Auto: 2001 330ci
marcozandrini thanks for the advice.
The car has 73000 miles on it.
Pat
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  #8  
Old Yesterday, 09:08 AM
James "Pat" James "Pat" is offline
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Mein Auto: 2001 330ci
The only reason that I changed the water pump is because I'm the second owner and don't see any evidence in the service records of it being replaced.
I was changing tensioner pulleys anyway, so I decided to do the water pump at the same time.
What causes the expansion tank to fail?
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  #9  
Old Yesterday, 09:39 AM
Tommy D Tommy D is offline
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The plastic tank develops hairline cracks over time from all the heat in the engine bay. Did you properly bleed your system when you added the new coolant?
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  #10  
Old Yesterday, 10:32 AM
James "Pat" James "Pat" is offline
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Mein Auto: 2001 330ci
Yes.
Then based on the Bavauto video, I checked a few days later and topped it up, not being too worried if I overfilled a little because it was supposed to overflow out.
Well THAT didn't happen.
It would appear at this point that I should order a new cap at the same time that I order the new expansion tank.
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  #11  
Old Yesterday, 10:40 AM
cvx5832 cvx5832 is offline
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Quote:
Originally Posted by Tommy D View Post
The plastic tank develops hairline cracks over time from all the heat in the engine bay. Did you properly bleed your system when you added the new coolant?
Did you fill it to the brim? Or did you use the bobber?
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  #12  
Old Yesterday, 08:35 PM
James "Pat" James "Pat" is offline
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Mein Auto: 2001 330ci
No, I didn't fill it anywhere near that high.



Do you think it would be a good idea to change the radiator and hoses?
14 years old with 73,000 miles
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