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Old 05-13-2011, 02:19 AM
charles bledsoe's Avatar
charles bledsoe charles bledsoe is offline
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Default Ticking sound from under hood

I have a 2006 GTO with 14K miles on it and have started hearing a sound from under the hood which sounds like valves ticking. Has anyone experience this at such low miles? I have never had it up to the red line and usually shift prior to reaching 4000 RPM's although I have had it up to 5000 RPM's a time or two, or three.
Thanks
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Old 05-13-2011, 02:12 PM
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Verdoro 68 Verdoro 68 is offline
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LS2s (and LS engines in general) are notorious for the sewing machine-like valve train clatter. Are you sure it's a new sound?

That said, I have heard a lot about oiling issues with LS2s - primarily oil pumps giving up the ghost - so it's feasible something could be going on.

Can you give more specifics on the sound? Does it sound like one valve tapping or is it a consistent clattering? Louder/more frequent with more RPMs or always the same?
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Old 05-13-2011, 04:43 PM
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verdoro 68-
Thanks for the reply. I just started noticing it a few weeks back. I do not drive it very much, and first noticed it on the Hwy on a stretch that had a concrete barrier. I had the window down while the A/C was getting up to a good cold Temp. It was a very faint ticking sound. When I got home I let the window down and listened, it sounded like maybe one valve might be making the noise. I will check out what you recommend and let you know what I find out.
Thanks
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1966 GTO Vert automatic.
1969 CR Judge Ram Air III 4sp Pattern Car.
1969 GTO standard 350HP TH-400.
2006 GTO Phantom Black 6spd.
1972 Formula 455HO Ram Air.
1976 LE Trans Am 50th Anniversary Edition with T top.
1976 Formula 350.
1977 Grand Prix Model J 350.
1978 Trans am 400 Pontiac.
1979 Trans am 403 Olds.
1968 Olds 442.
1971 TR6.
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Old 05-13-2011, 09:43 PM
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I bought my 06 new and the valve train has been a bit noisy since I first drove off the lot. No different after 50+K miles. I notice it when the engine is running in the garage and at drive-thru windows and such, but can't really hear it otherwise. Maybe you are just now noticing it.

Never over 5000 RPM's? Wow, that may be part of the problem! I drive mine nice, but the LS-2 does seem to love eating up highway entrance ramps!
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Old 05-17-2011, 07:35 PM
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Also the injectors cycling make some clicking.
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  #6  
Old 05-18-2011, 01:17 PM
IOWA552SLOW IOWA552SLOW is offline
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my 04 (yes i know ls1) has a "noisy" valve train. has since i bought at 28k miles. never any better, never any worse. don't hear it on the highway on when idling. in the driveway or drivethru situations. i was told once that the ls motors are know for noisier drive trains. i have alway thought that mine was noisy. i put an oil pressure guage in mine, carries 40+ lbs of pressure at idle and will hit 100+lbs at full throttle. an actual pressure guage may help put your mind at ease if you know the pressure.
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Old 06-01-2011, 09:14 PM
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14,000 miles??? The problem is.... you don't drive it enough! 5k rpm??? You aren't driving it hard enough either
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Old 06-08-2011, 03:21 PM
TA-71 TA-71 is offline
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My 06 developed that same sound, took it into the dealer and found the cam and flat spotted a lobe. Ended up replacing the cam under warranty.
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  #9  
Old 09-12-2013, 03:40 PM
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It is typical for the LS motors to have noisy lifters. It doesn't mean they are bad but if it gets worse, then its time to swap them out.
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