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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 06-24-2009, 07:38 AM
gearjam gearjam is offline
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03 745I topend noise

Is there a problem that happens to the valve train that makes a noise like a valve tap but with some clattering almost like chain noise? Seems to be on left side?
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  #2  
Old 06-24-2009, 09:23 AM
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07841-tb 07841-tb is offline
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Does the noise go away after the car has warmed up?
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  #3  
Old 06-24-2009, 11:54 AM
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dfauerbach dfauerbach is offline
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Low oil or sticky lifter, run some sea foam through the engine might help clean out some of the gunk. How many miles? that stuff scares me to be honest but allot of people swear by it.
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  #4  
Old 06-24-2009, 12:09 PM
bghubr bghubr is offline
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What part of the left side? Front, Rear, Middle??
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  #5  
Old 06-30-2009, 04:52 AM
RICH "B" RICH "B" is offline
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Mein Auto: 745li
valve tapping noise



My car is doing the same thing, it sound like a chain is loose or somthing in the engine. It is towards the front.

So far I have completed the following steps to try and resolve the issue:
  • Lucus Oil treatment
  • Lucus Gas treatment
  • Lucus Transmission treatment
  • I stopped putting regular gas into the gas that seem to help a lot also. I still hear the sound of tapping but it is getting better.

Anyone have any more ideas?

Last edited by RICH "B"; 06-30-2009 at 04:55 AM.
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  #6  
Old 06-30-2009, 05:17 AM
bghubr bghubr is offline
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Sometimes fuel injectors make tapping noises as they age.
Especially if they are clogging up.
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  #7  
Old 06-30-2009, 05:52 AM
Lugn Lugn is offline
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Is it tapping, ticking or rattling? Could be cam, tensioners, lifters, injector, etc, etc. Depends on how the car sounds. If you bring to a mechanic they can use a stethoscope (sp?) type device to pinpoint where the noise is coming from.
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  #8  
Old 06-30-2009, 05:55 AM
gfd1989 gfd1989 is offline
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regular gas? i thought that was a no-no
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