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Old Mar 30, 2003 | 02:58 PM
  #1  
DaleMX's Avatar
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Default Intake Question

Why do the composite intake manifolds have foam on the bottom? Does it have something to do with the Knock Sensors?
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Old Mar 30, 2003 | 03:12 PM
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Default Re: Intake Question

Tries to keep the water out of the sensors. I am waiting on my new KS harness as water got into mine. Tons of RTV silicone, and more foam for me!
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Old Mar 30, 2003 | 08:58 PM
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01redws6ta's Avatar
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From: jonesville, MI
Default Re: Intake Question

Yeah, the foam is meant to keep water and debris out of the "valley". Silicone can be placed around rubber knock sensor wire boot to help keep water out of sensor holes. In fact, this is a published GM "fix" for corrosion in knock sensor hole/connector.
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