Generation III Internal Engine 1997-2006 LS1 | LS6
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loud knocking problem :(

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Old 06-12-2003, 08:43 PM
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Default loud knocking problem :(

my engine was making a loud knocking sound and i took the passanger side head off and i noticed the piston had a pattern that matched the inside of the head. it wasnt hitting the valves just the head. any suggestions why this is happening?

stock engine btw 99 z28
Old 06-12-2003, 09:58 PM
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Default Re: loud knocking problem :(

TTT anyone?
Old 06-12-2003, 10:07 PM
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Default Re: loud knocking problem :(

Time for some new rods and bolts...probably spun a bearing and your piston is extending beyond the limit of the block.
Old 06-12-2003, 10:17 PM
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Default Re: loud knocking problem :(

That's what I was thinking man that sucks good luck atleast you can upgrade for a reason.
Old 06-13-2003, 01:35 PM
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Default Re: loud knocking problem :(

i dont see any damage to the cylinder wall does that mean it should be an easy fix. or will i not know till i open her up more?




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