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

what the hell is that!

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Old Jun 29, 2011 | 10:47 AM
  #21  
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Originally Posted by SS RRR
Like I said earlier... I think it may have been something left over from a hidden direct port system under the manifold.
That would be my guess as well.
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Old Jun 29, 2011 | 06:35 PM
  #22  
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Tried to clean up the picture. Need some picture editing software

Here is the hole, it's an oil passage.

Al 95 Z28
Attached Thumbnails what the hell is that!-block-hole.jpg  
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Old Jun 29, 2011 | 06:38 PM
  #23  
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My block didn't have that awesome mod.
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Old Jun 29, 2011 | 07:23 PM
  #24  
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you guys are looking at it wrong (i did at first too) the hole isn't going towards the front of the motor. its going down. i just went and took a picture of my old shortblock for you guys. OP there should be a plug down in there

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Old Jun 29, 2011 | 07:27 PM
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^^^^^^

/thread

mystery solved.
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Old Jun 29, 2011 | 07:31 PM
  #26  
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It's definitely a factory thing. Everyone open up your How to rebuild small block Chevy LT1/LT4 engines book and look at the picture on page 137 (if the picture above is not enough proof). It ain't no secret hole put there by some yahoo with a drill.
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Old Jun 30, 2011 | 10:32 AM
  #27  
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Nahnah, its some direct port nawzzzzzz to increase oil pressure!!!!!!
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Old Jun 30, 2011 | 10:35 AM
  #28  
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WOW....holy optical illusion.........yea thats suposta be there lol........the plug is just probably leaking.....if the plug was missing you would definatly know about it trust me lol
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Old Jun 30, 2011 | 11:24 AM
  #29  
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Optical illusion is right! Crazy how your eyes will deceive you.
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Old Jul 1, 2011 | 03:52 PM
  #30  
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sorry about the confusion everyone i meant to put up more pics but got side tracked haha, since it is a plug and obviously appears to be leaking a bit, is there a place where i can buy the plug in question? thanks for the help btw, because i had no idea what was going on lol
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Old Jul 1, 2011 | 04:04 PM
  #31  
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The oil is probably not coming from that plug, but just remove it, apply new sealant and re-install it.
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Old Jul 1, 2011 | 05:29 PM
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Originally Posted by shbox
The oil is probably not coming from that plug, but just remove it, apply new sealant and re-install it.
^what he said.

the head cover's half of the hole so there's no way the plug could back out, and if it was missing you'd be losing a lot more oil. just put new sealant on it if you're taking the heads off
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Old Jul 1, 2011 | 05:56 PM
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Na it cant be a plug.

looks to me like that would be the oil port to keep the rear of the intake/trans bellhousing/anything under it well lubricated. I beleive GM did this to cut down on rust in those areas.
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Old Jul 1, 2011 | 06:08 PM
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Originally Posted by trilkb
Na it cant be a plug.

looks to me like that would be the oil port to keep the rear of the intake/trans bellhousing/anything under it well lubricated. I beleive GM did this to cut down on rust in those areas.
On stick shift cars it's there to insure clutch chatter.

Al 95 Z28 engine is ready to drop in.
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