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Old Mar 25, 2014 | 10:34 PM
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Default Engine noise
When I start my 2005 C6 w/LS2 in the morning I hear a flapping or ticking sound from under the hood. It doesn't sound like valves or tappets it sound more like flapping that is opening and closing with the speed of the engine. After it warms up it purrs like a wild tiger.

Any comments would be appreciated

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Old Mar 28, 2014 | 10:33 AM
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Originally Posted by b_mouzakis
When I start my 2005 C6 w/LS2 in the morning I hear a flapping or ticking sound from under the hood. It doesn't sound like valves or tappets it sound more like flapping that is opening and closing with the speed of the engine. After it warms up it purrs like a wild tiger.

Any comments would be appreciated

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Mine ticks too. I usually hear it around 2-3 grand rpm. It sounds like the valves, but a buddy is saying its the injectors.

I just put a new engine in the car and the new engine ticks like the old one.
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Old Mar 28, 2014 | 10:34 AM
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Btw 2005 c6 ls2
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Old Mar 28, 2014 | 06:24 PM
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Piston slap till engine warms up? LS engines famous for this.
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Old Mar 28, 2014 | 06:27 PM
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Check your harmonic balancer for wobble.
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Old Mar 29, 2014 | 11:57 PM
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Default Thank you for responding to my question.
Originally Posted by imholta
Mine ticks too. I usually hear it around 2-3 grand rpm. It sounds like the valves, but a buddy is saying its the injectors.

I just put a new engine in the car and the new engine ticks like the old one.
Thank you for responding to my question. It is still annoying but at least I know I wont be replacing the engine any time soon. What happen to your engine that you needed to replace it?

Bill
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Old Mar 29, 2014 | 11:59 PM
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Default piston slap???
Originally Posted by vettenutchas
Piston slap till engine warms up? LS engines famous for this.
Thanks for your response. I'm not sure what piston slap is?
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Old Mar 30, 2014 | 12:03 AM
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Default Harmonic Balancer
Originally Posted by 1BADLS3
Check your harmonic balancer for wobble.
Thanks for your quick response - Trying not to sound stupid but what and where is the harmonic balancer located?

Bill
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Old Mar 30, 2014 | 10:40 AM
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Originally Posted by b_mouzakis
Thanks for your quick response - Trying not to sound stupid but what and where is the harmonic balancer located?

Bill
On the front of the engine, main pulley (on crankshaft).
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Old Mar 30, 2014 | 10:50 AM
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Originally Posted by 1BADLS3
On the front of the engine, main pulley (on crankshaft).
Thanks for the information. I will check this ASAP

BILL
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Old Mar 30, 2014 | 11:18 AM
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Originally Posted by b_mouzakis
Thanks for the information. I will check this ASAP

BILL
Do a search (here and Google), there is a lot of info out there and also videos showing what to look for.
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