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'98 Buick Regal LS - '91 Caddy Seville - '87 Caddy Seville!
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Here is a brighter picture of the first intake manifold. It looks like an EGR passage to me too :hmm:
 

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'98 Buick Regal LS - '91 Caddy Seville - '87 Caddy Seville!
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terrible one said:
there isnt an egr port
Then what may I ask is the hole above the intake inlet? It doesn't look like a thermostat port or anything...

Edit: you might be right in that it is not an EGR port, because the EGR ports that I've seen have a much smaller hole than that one, and are usually circular...
 

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01 frontier , 89 Shelby CSX vnt
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lumina , once you get that figured out i need you to get back on tracking down my mind .....it seems to have gone missing , like the egr valve for the manifold .....dont tell me im seeing things again , im not drinking at all right now
 

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'98 Buick Regal LS - '91 Caddy Seville - '87 Caddy Seville!
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Stoneage_Caddy said:
lumina , once you get that figured out i need you to get back on tracking down my mind .....it seems to have gone missing , like the egr valve for the manifold .....dont tell me im seeing things again , im not drinking at all right now
You're not seeing things, it looks like an EGR to me too, but in the provided picture (below), the EGR port shows two ports, one is small and the other, also small, is circular. The picture that Terrible One provided has a squared look to it and is quite large. But in conradiction to my previous statement, I am still going with that it's an EGR port...

Well, here is the aforementioned picture of the intake manifold that I put on my '87 Seville. The EGR port and water ports are outlined so-to-speak...:D
 

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01 frontier , 89 Shelby CSX vnt
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im still pretty sure myself , for many years thats the area where there were small exaust ports leading from the heads towards the intake manifolds ...now ive seen EGR ports that big for 6.2 diesels (yes they had EGR) , in fact they were idenatical to the manifold hes showing ....well almost .....that pesky area where the carb/tb bolts to isnt there ont he 6.2 ...just a big damn hole ....


was always a trip seeing new guys with 6.2s "hey mike wheres the throttle plates?" ...LOL .....
 

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1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII
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As long as we're posting intakes, I can't remember who was asking, but:



Cross-ram > all.
 

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None now...1972 Challenger=my pride and joy.
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Oooohhhhhh...Chrysler Big Block! That intake is worth a FORTUNE! Max Wedge Rules! Well, Max Wedge almost rules, under the real, king god almighty Hemi!
 

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1994 Fleetwood 60" Stretch; '07 Avalanche, '95 Nighthawk
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terrible one said:
That isn't an EGR port, it's the heated choke port, which is why it is located on top of the exhaust crossover passage.
Beat me to it. That's for the choke mechanism - I had forgotten how primitive early fuel management was.

Jim
 

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1994 Fleetwood 60" Stretch; '07 Avalanche, '95 Nighthawk
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Here's mine. One with the 'doghouse' installed, another without it. I've got a crazy looking plate that redistributes the air to eliminate inefficiencies caused by the factory arrangement.

Jim
 

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1981 Sedan DeVille Diesel
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What year is it off of? That will easily clear things up. It does look like an egr port, but I'm not sure if Cad used different locations for the valve. Here's a picture of two intakes just for some reference; one clearly egr, and one non-egr:
 

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