It could be the Injectors.
Lifter noise normal?
Thread Starter
Racer
Joined: Sep 2007
Posts: 345
Likes: 4
From: Northeast OH
Lifter noise normal?
I have a 2011 base coupe and notice some lifter noise. Is this normal for the LS3 engine? I notice it from inside the car. I only have a little over 900 miles on the car. I have not had the motor over 5000 RPM and have followed the recommended break-in procedure.
Safety Car
Joined: Mar 2009
Posts: 4,101
Likes: 719
From: Northeast MA & Mad Beach FL
Team Owner
Joined: Nov 2006
Posts: 21,136
Likes: 212
From: Long Island New York
If you do headers you'll hear all that lovely mechanical music even more. The long tubes act somewhat like a tuning fork in transmitting the moving parts working. Sounds great to me.
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Race Director
Joined: Mar 2011
Posts: 13,262
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From: SW Florida
2021 C6 of the Year Finalist - Modified
And if you install a wide-profile aftermarket cam with lots of lift, you will get lots of valvetrain noise do to the fact that the 'ramp speeds' are so fast ... at least in the aluminum block LSx engines.
Pro
Joined: Jun 2011
Posts: 695
Likes: 0
From: NoVA
All pushrod motors make those sorts of noises. You can hear them very well if you drive next to a concrete divider/wall. As long as the noise is uniform, ie one lifter doesn't stand out, its fine. The people that say they can't hear anything are just deaf.
Melting Slicks
Joined: Dec 2009
Posts: 3,213
Likes: 17
first thing i noticed on my new GS no''noise .my o9 and 08 are loud as h***.you should here no lifter noise if that motor is tight.i have went round and round with GM but all i hear is "THATS NORMAL" 
same when the tops were flying off THATS NORMAL'' selling the 09 and 08 before i have real probs.ck. you vin in the gm bul.see if they have had other comp.you will hear some inj. noise with the hood up.
.IF THIS WAS NORMAL every car would sound that way . go back to the dealer start some other cars up see what you think.best of luck
same when the tops were flying off THATS NORMAL'' selling the 09 and 08 before i have real probs.ck. you vin in the gm bul.see if they have had other comp.you will hear some inj. noise with the hood up. .IF THIS WAS NORMAL every car would sound that way . go back to the dealer start some other cars up see what you think.best of luck
