LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Rod knock, really?

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Old Mar 27, 2012 | 12:11 AM
  #21  
KyleW707's Avatar
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From: CenTex
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+1 on the exhaust gasket. If an exhaust leak is bad enough it can sound like a knock. Example: I started my car with the front o2 sensors out and my dad who has owned, operated, and worked in an automotive shop for 25+ years immediately thought it was knocking until I informed him that I had the sensors out.
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Old Mar 27, 2012 | 08:18 AM
  #22  
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From: Fort Riley, Kansas
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Fingers crossed for lifter... tho if only you could have heard it the other day.... it was so not a lifter. I'm really hoping that theres just something loose somewhere thats vibrating sometimes. Took it out again this morning and it was still making noise when I parked it, and it followed RPMs, but when I was driving, I could get the noise to stop occasionally. Going to pick up a stethoscope today. With any luck I've prolly got multiple things going on and thats why I've been hearing different sounds.

I will be checking the fuel injectors too... anyone whos still paying attention know how the car would do if one or more injectors were shutting off after it warms up?
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Old Mar 27, 2012 | 08:19 AM
  #23  
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Its quite possible I have a really big exhaust leak where the EGR goes to the manifold, but I figured if that were my issue that it'd be louder on one side than the other.
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