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| Re: [GMCnet] What the heck is this? A quiz [message #281527 is a reply to message #281523] |
Sun, 05 July 2015 20:03   |
Kosier
Messages: 834
Registered: February 2008
Karma: 1
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Senior Member |
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Kerry,
Those are the outlets for the exhaust recirculation system. On my Cad 500 I
tapped them and installed plugs. This was really necessary because
I milled off all the crossover passage on the bottom of the manifold. I
wanted to get rid of as much heavy iron as possible. Obviously, I first
poured the passage in the heads full of old Olds pistons. JWID
Gary Kosier
77PB w/500 Cad
Newark, Oh
-----Original Message-----
From: Kerry Pinkerton
Sent: Sunday, July 05, 2015 8:33 PM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] What the heck is this? A quiz
I determined I had a vacuum leak either in my carb or in the intake manifold
of my 403. A cracked intake was a possibility so I pulled the carb and
with a strong light saw this:
http://www.gmcmhphotos.com/photos/misc/p58339-hole-in-intake.html
One hole centered under both primary bores.
http://www.gmcmhphotos.com/photos/misc/p58340-hole-in-intake.html
Close up of the holes. The left hole will accept a 1/2" bolt which is why
it looks cleaner than the other which appears smaller...perhaps 7/16"
http://www.gmcmhphotos.com/photos/misc/p58342-hole-in-intake.html
http://www.gmcmhphotos.com/photos/misc/p58341-hole-in-intake.html
I saw this and basically went insane. What the hell are two holes doing in
the bottom of the intake runners. You can see the bottom of the passage
below the holes.
I stumped 3 people before I got the answer. Feel free to offer your idea in
this thread. I'm going to explain in another thread. If you want to
play along don't read the other thread first. 8o :lol: :twisted:
--
Kerry Pinkerton
North Alabama
77 Eleganza II, 403CI, Manny Brakes, 1 ton, tranny, lots of aluminum
goodies.
77 Kingsley by Buskirk. Rear twins/dry bath, EFI Caddy.
Also a 76 Eleganza to be re-bodied as an Art Deco car hauler
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| Re: [GMCnet] What the heck is this? A quiz [message #281565 is a reply to message #281554] |
Mon, 06 July 2015 11:24 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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Les,
Gary has a large shop with many CAD 500 and Olds 455 engines in storage and in parts. If he doesn’t have it, it probably doesn’t exist.
JR Wright
78 Buskirk Stretch
75 Avion
Michigan
> On Jul 6, 2015, at 9:37 AM, Les Burt wrote:
>
>
>> On Jul 5, 2015, at 9:03 PM, Kosier wrote:
>>
>> Obviously, I first
>> poured the passage in the heads full of old Olds pistons.
>
>
> Garry,
> So you needed some olds parts to help keep your Caddy running :) .
> Above average recycling skills I might add!
>
>
> Les Burt
> Montreal
> '75 Eleganza 26'
> The EWIP (Eternal Work In Progress)
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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