GMT 800 & Older GM General Discussion 2006 & Older Trucks | General Discussion

knocking noise

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Old Aug 20, 2008 | 08:28 PM
  #11  
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Originally Posted by v8
well its a loose term, as lifter went bad.
that makes more sense.
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Old Aug 20, 2008 | 08:56 PM
  #12  
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Originally Posted by gtosilverado
he was racing when it happened.... it sounds up high to me.
his shift points are 6200,6000,5800 and he said he was around 90 mph when it happened. that would put him in 3rd gear with 22's@30." and 3.73 gears right?
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Old Aug 20, 2008 | 08:57 PM
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Originally Posted by 00ChevyScott
that makes more sense.
hahha
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Old Aug 20, 2008 | 09:07 PM
  #14  
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Originally Posted by v8
his shift points are 6200,6000,5800 and he said he was around 90 mph when it happened. that would put him in 3rd gear with 22's@30." and 3.73 gears right?
could have been right as it shifted from 2nd to 3rd.... at high rpm's... and yes he does 3.73s.
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Old Aug 21, 2008 | 04:55 PM
  #15  
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it sounds like one of the lifters
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Old Aug 21, 2008 | 06:05 PM
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I know that noise all too well... Lifter. Thank gawd it was under warranty.
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Old Aug 21, 2008 | 08:31 PM
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v8
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they pulled the plugs,valve covers,rockers and then told me #5 spark plug was bent closed, had them move the piston to the top and feel if the piston was still there ahhahaa, said it wasn't smoking and no metal in oil so there putting it back together and hoping for the best ahahhaa, I still think its a lifter gone bad,but ya never know. Good luck guys.
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Old Aug 21, 2008 | 09:43 PM
  #18  
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puttin it back together, on sunday we will continue........ we will let u know if it was just the spark plug.... i want to stay optimistic but idk if the spark plug was causing the knocking... maybe just missfires but who knows, these things can be a bit weird sometimes.
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Old Aug 21, 2008 | 10:10 PM
  #19  
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good deal.
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Old Aug 21, 2008 | 11:06 PM
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Put a quart of marvel mystery oil in it or a quart of transmission fluid and run the **** out of it for 30 minutes. If that doesn't unstick it nothing will. Heads have to come off.
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