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

Help, There is a knocking/Chopping noise

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Old Aug 11, 2004 | 06:21 PM
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ddj19852003's Avatar
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Help, There is a knocking/Chopping noise

There is a knocking or chopping noise comming form the left side of my engine compartment it is very slight at idle but it gets louder while acelerating anyone know what this is?
Old Aug 11, 2004 | 06:25 PM
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Van
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Re: Help, There is a knocking/Chopping noise

Exhaust leak..... One of your manifold bolts probably sheared off due to Different expansion rates between your aluminum heads and cast iron manifolds.... Very common....
Old Aug 11, 2004 | 07:42 PM
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Re: Help, There is a knocking/Chopping noise

how do i fix this or do I ? is it expensive ?
Old Aug 12, 2004 | 08:34 AM
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Van
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Re: Help, There is a knocking/Chopping noise

If the bolt is broken off below the surface of the head it'll be a serious pain in the butt. Check the bolts before you start taking stuff apart..... I'll bet it's one, or both of the bolts on #7....
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