Loud Knock After Replacing Intake Manifold

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SquareRoot

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Mike
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85
Truck Model
K20
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350
Ok guys. I realized I am missing a small nut (maybe 3/16”x1/4”) from my gasket scraper and now, just now after starting the engine a dozen times, I am picking up what sounds like a small bb sound. It’s not synchronous, but random. Take a listen…
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:popcorn:
 

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tdsunderla

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Florida
First Name
Tim
Truck Year
1980
Truck Model
GMC
Engine Size
350
We're invested now, please let us know what you find :)
Will absolutely let everyone know. Going to finish up some other things first like Dakota Digital instrument cluster and Painless wiring harness (items started before changing out the intake manifold). If anyone is close to Melbourne Florida and wants to help diagnose - would welcome a visit.
 

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