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The dreaded "ticking" sound...

 
Old 04-14-2019, 11:08 PM
  #21  
NY09C6
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Sounds normal. The sounds peeks about 1800 rpm and then subsides.
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Old 04-14-2019, 11:18 PM
  #22  
Turbo6TA
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I have heard from more than one source that the noisy valve train (sewing machine sound) that these LS engines have is because of the fast ramp speed of the camshaft lobes.

This was talked about way back in 1997 when the first LS1 came out in the Corvette and 1998 when the LS1 first appeared in the F body cars (Camaro and Trans Am)
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Old 04-15-2019, 03:55 AM
  #23  
4head
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I just got my 2013 GS last week. Pulls great... well for stock. Lifters sound kind of loud. But compression was 176-179 on all 8. Plugs look great. Oil smells a little gas-like but I'll do a blackstone analysis on it.

I've never heard of LS3's of any year having any sort of issue.
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Old 04-18-2019, 04:05 PM
  #24  
SlothX311
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Originally Posted by Carsonvette View Post
Mine has had the same "sewing machine" sound since new.
Yeah! Thats a perfect way to describe the sound

When I first drove a C6 I was like ..... "uhhhh whats wrong with the engine?" Test drove at least a dozen, they all sound that way. The only time you don't hear it is if the car is cammed or has a loud exhaust.
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