04-06 Engine Tech LS engine tech center. Get the most out of your car here. |
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05-13-2011, 02:19 AM
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Ultimate Warrior
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Join Date: Dec 2006
Location: Flintville TN
Posts: 1,678
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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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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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05-13-2011, 02:12 PM
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Ultimate Warrior
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Join Date: Jun 2003
Location: Clayton, CA
Posts: 2,886
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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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Ken
'68 GTO - 464 - Ram Air II heads - 236/242 roller - 9.5” TSP converter - Moser 3.55 Truetrac ( build thread | walk around)
'95 Comp T/A #6 M6 - bone stock ( pics)
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05-13-2011, 04:43 PM
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Ultimate Warrior
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Join Date: Dec 2006
Location: Flintville TN
Posts: 1,678
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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
__________________
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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05-13-2011, 09:43 PM
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Ultimate Warrior
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Join Date: Apr 2009
Location: Augusta, GA
Posts: 1,677
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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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1969 Lemans vert, matador red, 462 CI, 3.07 12-bolt posi
1974 455 TA, admiralty blue/red interior HPP "cover car" - sold
"The best way to show a car is to drive it"
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05-17-2011, 07:35 PM
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Ultimate Warrior
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Join Date: Dec 1999
Location: Katy,TX USA
Posts: 20,826
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Also the injectors cycling make some clicking.
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
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05-18-2011, 01:17 PM
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Member
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Join Date: Jan 2009
Location: NW IOWA
Posts: 59
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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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06-01-2011, 09:14 PM
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Ultimate Warrior
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Join Date: Sep 2008
Location: rural California
Posts: 1,885
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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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Current Pontiacs -
1973 Formula SD455 - #'s auto orig paint
1972 Trans Am - 4 speed orig paint
1974 Formula 400 - Ram Air automatic
1966 2+2 convertible - 421 4bbl automatic
1967 Grand Prix - 4 speed orig paint
1967 GTO - 4 speed orig paint 35k orig miles
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06-08-2011, 03:21 PM
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Chief Ponti-yacker
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Join Date: Apr 2005
Location: Austin, Texas
Posts: 507
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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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1971 Trans Am - Sold
1977 Can Am - Sold
2002 Trans Am Firehawk - Sold
2004 GTO - Sold
2006 GTO - Sold
1970 GTO - Sold
1972 Trans Am - Sold
1970 Trans Am - Current Project
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09-12-2013, 03:40 PM
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Pypes & PY Tech
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Join Date: Mar 2009
Location: PA
Posts: 16
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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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