ls1 top end knocking need help
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Registered User
Joined: Jan 2015
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From: Lawrenceville, GA
ls1 top end knocking need help i have a 98' ls1 daily driver. it has roughly 155k miles on it.
a few days ago it started making a really loud noise sorta like a tapping noise.
its def coming from the top of the motor.
i have parked the car since it started making the noise.
oil pressure is good...
the knocking does ease up when i push the gas but does not stop even after motor is warm so i dont think it is a piston slap.
any ideas?
a few days ago it started making a really loud noise sorta like a tapping noise.
its def coming from the top of the motor.
i have parked the car since it started making the noise.
oil pressure is good...
the knocking does ease up when i push the gas but does not stop even after motor is warm so i dont think it is a piston slap.
any ideas?
Very possibly a lifter. They can make a loud tapping noise when going bad. All aluminum LS1 motors all of a sudden making a really loud tapping noise is not normal, nor ok.
Edit: I noticed whoever posted before me deleted their very misleading post, which the second sentence of my post was referring to. In case you were wondering why I said that.
Edit: I noticed whoever posted before me deleted their very misleading post, which the second sentence of my post was referring to. In case you were wondering why I said that.
Last edited by R6cowboy; Jan 7, 2015 at 04:35 PM.
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Teching In
Joined: Oct 2009
Posts: 29
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From: Whittier CA
I have the same problem, and pulled the valve covers off today. Replace the pushrods and noticed the rocker arms have some side to side play and diagonal play when holding the stud. I don't know how much play is acceptable.
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