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7 Series - E38 (1995 - 2001)

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  #1  
Old 03-25-2013, 10:19 AM
apocolyps3 apocolyps3 is offline
E38 2001 740 il
Location: Tempe, AZ
 
Join Date: Jul 2012
Posts: 22
Mein Auto: E38 2001 740 il
Odd Temp Spike

Hi,
I have a 2001 BMW 740il. I have the weirdest problem that I can't seem to resolve.

Every once awhile, the temp indicator spikes near the first line without nearing the red zone. It stays for about 10-15 seconds and drops back to the middle.

I thought it might be a lack of coolant, but that is not the case.
Here is what is known:
Both upper and lower radiator hose is holding pressure
No coolant leak. The reservoir still have same fluid level
Replace both coolant temperature sensor
Bleed the coolant system multiple time
Heater does blow hot when directed

I have no idea what to do next. This is stressing me out especially when I go longer drive.
Please advise. Thank you.
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E38 2001 740il
E34 1995 540i
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  #2  
Old 03-26-2013, 12:10 AM
apocolyps3 apocolyps3 is offline
E38 2001 740 il
Location: Tempe, AZ
 
Join Date: Jul 2012
Posts: 22
Mein Auto: E38 2001 740 il
Anyone has a clue how to fix this issue???
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E38 2001 740il
E34 1995 540i
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  #3  
Old 03-29-2013, 05:07 PM
apocolyps3 apocolyps3 is offline
E38 2001 740 il
Location: Tempe, AZ
 
Join Date: Jul 2012
Posts: 22
Mein Auto: E38 2001 740 il
Blah...
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E38 2001 740il
E34 1995 540i
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