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gearjam 06-24-2009 07:38 AM

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?

07841-tb 06-24-2009 09:23 AM

Does the noise go away after the car has warmed up?

dfauerbach 06-24-2009 11:54 AM

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.

bghubr 06-24-2009 12:09 PM

What part of the left side? Front, Rear, Middle??

RICH "B" 06-30-2009 04:52 AM

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?

bghubr 06-30-2009 05:17 AM

Sometimes fuel injectors make tapping noises as they age.
Especially if they are clogging up.

Lugn 06-30-2009 05:52 AM

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.

gfd1989 06-30-2009 05:55 AM

regular gas? i thought that was a no-no

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