Is this Ls1 engine noise normal?
Thread Starter
Teching In
Joined: May 2017
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Is this Ls1 engine noise normal? Hey everyone, started noticing tapping/ticking noise from inside the car. You can distinctly hear tapping picking up once I increase the revs a little. I removed carpet and insulation recently so not sure if ls1's are inherently noisy like that and I just started noticing it now or it's indeed a valvetrain issue?
My car is a swapped BMW and the motor has about 103K miles on it. Compression and leak tests checked out.
Sound clip:
My car is a swapped BMW and the motor has about 103K miles on it. Compression and leak tests checked out.
Sound clip:
TECH Apprentice
Joined: Feb 2010
Posts: 370
Likes: 138
Could be piston slap, a video from the top of the engine outside the vehicle will help with the sound. I had a 5.3 Silverado that sounded like that but it had 342k miles on it. Some motor honey and a trade in and it was no longer my problem. My issue was a faint rod knock though. Oil pressure had gone down to 12-15 psi at idle from its normal 40 with 5-30.
Thread Starter
Teching In
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Thread Starter
Teching In
Joined: May 2017
Posts: 16
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Thread Starter
Teching In
Joined: May 2017
Posts: 16
Likes: 0
I hope you are right. Not sure if the engine's been cammed before I got it. Based on the numbers it was putting down on a mild tune, 320 whp, I suspect not. In the future I want to replace lifters and rocker arms for a peace of mind though.
Teching In
Joined: Jul 2015
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I have a manual transmission in my truck and the release bearing is going bad, although the clutch
is still operational. When the clutch pedal is depressed, I can hear the input shaft winding down to a
stop, but a ticking sound remains, i.e.; the transmission is not the problem. Air in the clutch hydraulics
will burn up a release bearing, they're not designed to be run constant.
is still operational. When the clutch pedal is depressed, I can hear the input shaft winding down to a
stop, but a ticking sound remains, i.e.; the transmission is not the problem. Air in the clutch hydraulics
will burn up a release bearing, they're not designed to be run constant.
That’s a 97 or 98. Those did have piston slap issues.
Fully warmed up in that last video?
At any rate, sounds like an LS to me.
My 2000 vette had piston slap so bad when cold my neighbors commented.
Ron
Fully warmed up in that last video?
At any rate, sounds like an LS to me.
My 2000 vette had piston slap so bad when cold my neighbors commented.
Ron
Thread Starter
Teching In
Joined: May 2017
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Both videos were taken with a cold start. When the motor is fully warmed up I don't notice the sound inside the car.
Would you guys recommend to open up the engine or is it ok to drive around still?
Would you guys recommend to open up the engine or is it ok to drive around still?
Even managed a 10.99.
You will be fine I’m sure.