Fast clicking noise from engine?

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Aug 25, 2009 | 08:58 PM

Bat Man

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Fast clicking noise from engine?

Noticed this tonight, just cruising in 2nd or 3rd at 15-20mph, there is like a fast clicking noise that sounds like its coming from the engine. I've known some engine injectors to be loud, but never heard them while driving.

Is this normal for the LS3?

Aug 25, 2009 | 10:22 PM

MrDrezzUp

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If it sounds sorta like a sewing machine...it is the valve train.

Aug 25, 2009 | 11:08 PM

Sparo2

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Does it get progressively faster as revs come up? If so, it can be your valvetrain. If it only gets progressively faster when your picking up speed then it's probably soemthing not associated with the motor.

Aug 25, 2009 | 11:09 PM

Bat Man

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Quote:

Originally Posted by MrDrezzUp

If it sounds sorta like a sewing machine...it is the valve train.

Is that a problem? Or do the LS3s just have loud valve trains?

Aug 25, 2009 | 11:12 PM

Bat Man

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Not going to be able to drive it again until tomorrow. But I had the oil changed in it, and I checked oil level and thought it was low. But had Chevy mechanic check it again and he said it's a-ok.

Oil pressure is 28 at idle after proper warm up.

Aug 25, 2009 | 11:17 PM

Bat Man

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Ok, by sewing machine do you mean like this?
http://www.youtube.com/watch?v=WA4G_LDEflo

??
Cuz it does NOT sound like that, thank god

No it's way quieter than that.

Aug 25, 2009 | 11:54 PM

Icewind Dale

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Its totally normal. Look up other threads. Drive above 3000 and you don't hear the tick!

Aug 26, 2009 | 12:35 AM

MrDrezzUp

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The sewing machine sound is normal for the LSx based engines. For the LS3, a padded "upper" was added to the manifold intake. I suspect this was to help cut down on the noise! :-)