LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Rocker/lifter noise only at certain RPM?

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Old 05-16-2008, 10:12 PM
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Rocker/lifter noise only at certain RPM?

Ok so I've had my rockers installed for about 2 weeks drives great. My question is valve train is quiet at idle maybe a little louder than stock but not clicking or anything car is quiet while driving no problems, But I have noticed that when driving very slow like in a parking lot or so rpms at like 1200 to 1500 range, or when driving and slowing down once the rpms get into that range it sounds like a loose rocker kind of but definitely not as loud. Is this normal for 1.6 SA rockers cause other wise they are quiet.

Also I pulled the valve cover and reved the engine and it sounds normal, but if you sitting in traffic in between cars if I rev to about 1200 and hold you can hear some clicking that sounds kinda like a loose rocker kinda weird cause it only does it then. Hope this is normal noise for the rockers.

Thanks In advance
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Old 05-16-2008, 10:14 PM
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Sounds normal, especially if it is fairly quiet at idle.
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Old 05-16-2008, 10:59 PM
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haha ok good I was pretty sure it was I just needed some reassurance.
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Old 05-17-2008, 12:06 AM
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If you tightened them correctly then your probably ok. I know stock rockers are different than aftermarket when adjusting them.
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Old 05-17-2008, 10:52 AM
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What is your oil pressure at idle/low rpm? If its too low, it may increase the lifter noise.
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Old 05-17-2008, 11:32 AM
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Mine are like how you describe stock, is this bad? I've replaced the lifters recently, maybe I need to adjust the valves.
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Old 05-17-2008, 02:18 PM
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Originally Posted by Injuneer
What is your oil pressure at idle/low rpm? If its too low, it may increase the lifter noise.
Oil Pressure is good at idle its always right on or right above the first white tick mark.
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