INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

Does this 408 sound OK

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Old Jan 22, 2007 | 05:59 PM
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Default Does this 408 sound OK

Im concerned about the amount of valve train noise. I just got it running.408 idle
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Old Jan 22, 2007 | 06:13 PM
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What is that clunk sound at the 42-44 second mark? Its hard to hear anything distinct because of the sound quality of the vid but nothing sounds out of place othere than the clunks which I doubt are from the engine. What are you idling at rpm wise?
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Old Jan 22, 2007 | 06:21 PM
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I know that I was getting some popping from the exhaust just due to how lean it is at idle. I also know that the sound quality is poor but hey I tried.
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Old Jan 22, 2007 | 06:30 PM
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Do you hear something that worries you? I didnt hear any ticking like I was expecting. Maybe some guys with better trained ears will chime in. Do you hear anything different when you rev it up a few 100 rpm?
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Old Jan 22, 2007 | 06:30 PM
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might pull the valve covers off and check the rockers..
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Old Jan 22, 2007 | 06:38 PM
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It does sound like a really loud sewing machine. Might check your lifter preload. What does it do when you rev the engine? If you dont hear a loud ticking or any change in noise then I wouldnt worry about it.
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Old Jan 22, 2007 | 06:38 PM
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Heres a vid I just took. See how it sounds compared to yours in person and tell me what you think. Of course you cant really see anything but....

http://s7.photobucket.com/albums/y26...rrent=Idle.flv
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Old Jan 22, 2007 | 06:50 PM
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sounds the same to me. I guess I can't hurt anything.
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Old Jan 22, 2007 | 07:01 PM
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idk, it sounds way louder than my stock lm7 valvetrain, but hey, i dont know about new rockers/lifters/pushrods/cams.
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Old Jan 22, 2007 | 07:35 PM
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If im hearing what i think im hearing, i would def check your lifter preload. Sounds like your pushrods are way short.
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