valve tapping on acceleration - BMW Luxury Touring Community
 
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post #1 of 7 Old Apr 23rd, 2009, 10:21 am Thread Starter
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valve tapping on acceleration

When idling, no noise. When I speed up, I get a valve tap. I use only premium fuel.
It is a 2005 lt. Runs great, just that tapping noise. I thought the valves may need adjusted, but dealer didn't think so. Taking it in Monday. Anyone else have any issues?
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post #2 of 7 Old Apr 23rd, 2009, 10:23 am
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Re: valve tapping on acceleration

Normal at low rpms for some valve chatter. Typically below 3,000 rpm - and the harder you twist, the more obvious the chatter below 3K revs. This motor really loves the 4,000 and up range.

Brian
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post #3 of 7 Old Apr 23rd, 2009, 11:08 am Thread Starter
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Re: valve tapping on acceleration

Thanks for the info.
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post #4 of 7 Old Apr 23rd, 2009, 11:21 am
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Re: valve tapping on acceleration

Also the valves on the LT wear tight not loose. This is due to errosion of the valve seat rather than wear of the valve train.

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post #5 of 7 Old Apr 23rd, 2009, 12:57 pm
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Re: valve tapping on acceleration

It's not always the valves making the noise. It's common for lower RPM sounds to come from the tupperware or loose or broken exhaust stuff.
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post #6 of 7 Old Apr 23rd, 2009, 1:54 pm
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Re: valve tapping on acceleration

Quote:
Originally Posted by mjordans2000
It's not always the valves making the noise. It's common for lower RPM sounds to come from the tupperware or loose or broken exhaust stuff.
I vote for broken exhaust header. All too common.

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post #7 of 7 Old Apr 23rd, 2009, 2:00 pm
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Re: valve tapping on acceleration

Quote:
Originally Posted by dshealey
I vote for broken exhaust header. All too common.
x2
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