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E39 M5 (1998-2003)

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  #1  
Old 11-28-2012, 06:44 PM
///fast5 ///fast5 is offline
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Location: Arkansas
 
Join Date: Sep 2012
Posts: 15
Mein Auto: e39 Bmw M5, e46 Bmw 330i
Exclamation Cylinder head valve thickening turns knocking after 2500rpm

i was riding my m5 from work back to home. stopped at mcdonalds and start hearing valve thicking noise and after got on the road with accelleration thicking is going away than knocking starts. what the hack is that!!! any idea? no codes at this moment...

my oil level was good used valvoline vr1 10w-50 recently changed. no leak coolant good. what could happen? i drive my car high rpm. but thats what made for!!! i like pitchin back of my tailpipe. help
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  #2  
Old 12-02-2012, 01:09 PM
ard ard is online now
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Location: CA
 
Join Date: Jul 2009
Posts: 9,666
Mein Auto: '12 X5 35d/E39M5/996TTX50
I'd be concerned with bearing noise. DO NOT drive it until you get a proper diagnosis...you might change the oil and look at it....

M5board dot com... Search for rod and main bering posts ...
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  #3  
Old 12-02-2012, 05:19 PM
ard ard is online now
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Location: CA
 
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Mein Auto: '12 X5 35d/E39M5/996TTX50
I'll add, you when from a "ticking" sound, to a "knocking" sound?? Not sure you've spelled it twice wrong...

I'd park that car and not turn the key begore diagnosis.
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