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Blocks of foam under intake manifold

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Old 02-28-2008, 12:21 AM   #1
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Default Blocks of foam under intake manifold

I was installing my nitrous solenoids and plate last week and noticed there were blocks of foam under plastic intake manilfold in my truck. 06 silverado with a 4.8. Will it hurt anything to remove those blocks, or should I leave them alone? thanks in advance. By the way I also did the throttle body coolant bypass, will I have any issues with that?
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Old 02-28-2008, 12:47 AM   #2
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I'd leave them in there. They keep junk from getting under the intake manifold.
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Old 02-28-2008, 08:01 AM   #3
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I'd leave them in there. They keep junk from getting under the intake manifold.
agreed, junk also includes water entry is minimized, water getting down to the knock sensors is a primary cause of their failure.
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Old 02-28-2008, 08:12 AM   #4
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agreed, junk also includes water entry is minimized, water getting down to the knock sensors is a primary cause of their failure.

Amen.
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Old 02-28-2008, 09:20 AM   #5
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Their primary design was like a noise baffle, GM said. But they do serve a purpose in protecting from debris. But without them it's almost like an Air Gap Manifold but I'd safely say you'd never notice a power gain from removing them, probably a little more blabber at WOT.
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Old 02-28-2008, 12:25 PM   #6
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Thanks for the help.
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