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Motownsax

Ticking Noise Cold Start C6 LS3

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Motownsax

 

 

Just bought a 2012 with 18000 miles. On cold start I pick up a ticking noise. When driving the tick speeds up, Hear it for about 1 mile. If I let it idle and warm up then drive it there is no ticking. When warm no noise at all. Long story short from what I see this is normal on the LS3 and even have read on the later model cars. I don't know if the true name is piston slap but told this is normal. You can hear it about 1:38 seconds into the audio. THXXXXXXX in advance. Hopefully the audio clip works

 

Voice 001_sd.m4a

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Chameleon

Exhaust leak?  Check your exhaust bolts...

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TheCMSH

I believe the LS3 has the similar issue as the LS1 with carbon build up.  I use a fuel additive product call BG44K that will, after running a couple tanks through it quiets it down fairly significantly.

 

Also, check your spark plugs, fellow member here had a loose plug and it ticked in similar fashion

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Chameleon

Any progress?

 

I had this issue with my current LS3 on two separate occasions.  Once the header bolts were loose, and once the header gasket was bad and required replacement.

 

 

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