Got my intake back from the powerder coaters but they left a cork (I think) in a hole that's in the front of the intake, below the 3 holes for the throttle body. Does a bolt go there to block it off or is it for a vacuum connection? You can see the spot in question in the picture, it's the painted round part down by the bottom.



Hal

 

PCV connection.



edited to correct brain fart.

 

No. In the 95-97 LT1's that is where the PCV valve vacuum line connects. In the 94's, it is plugged with a pipe plug. Not sure what, if anything was attached there in the 93's.

Courtesy of Shoebox:

http://shbox.com/1/pcv_pipe.jpg

 

Thanks guys! I'll check into those. I hate all these vacuum lines, too easy to forget which is for which.

Hal

 

That's why they put the vacuum line diagram on top of the radiator cover.

 

Oh, you mean the cover that holds the diagrams that I have to take off before smog inspection



(Not that I'm am withholding anything important and it easily passes smog)

Hal

 

Yeah you are right, I knew what it was just typed wrong . I am going to go back and change it to avoid confusion.


I believe that hole is missing on the 93s

 

Correct, there is no PCV connection on the front of a 93 manifold.
It's on the side of the manifold, so the PCV tube is a U shape.

 

When I switched to the vented opti, I used that hole to mount pcv vac. line .

 

Is this the connection with the metal line with rubber connectors on both ends?

Hal

 

When you put the tbody on , I think that hole will be covered?

 

Nope

 

He's not asking about the open, black hole right below the throttle body bores. He's asking about a hole about 2" below the TB bores, that has a cork in it, and is covered with powder coat, making it almost invisible in the picture.