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LT-1 intake with no heater hose fitting

Forum: C3 Engines, Driveline and Handling

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LT-1 intake with no heater hose fitting

Posted: 3/26/07 5:03pmMessage 1 of 5
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F4Gary
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Grapevine, TX - USA
Joined: 8/26/2006
Posts: 1539
Vette(s): 1972 LT-1 convertible with factory air. 2017 Black Rose Grand Sport M7 convertible.
So I got my LT-1 intake manifold from ebay.  It has no provision for a heater hose fitting.  Is this the way they came over the counter an then the installer drill and tapped a hole, or has this one just been welded up.  If so, whoever welded it did a really nice job because I can't tell.  So, before I go drilling and tapping a hole, I don't have some rare race manifold do I?  It's a 3959594 71-72 LT-1 intake.
 
It's this one:
 
F4Gary2007-03-26 21:19:22

   

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LT-1 intake with no heater hose fitting

Posted: 3/26/07 8:50pmMessage 2 of 5
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eddie20875
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Lanoka Harbor, NJ - USA
Joined: 12/21/2006
Posts: 2191
Vette(s): 1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c
just a guess here but is it possible that the return is supposed to be in the thermostat housing?
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LT-1 intake with no heater hose fitting

Posted: 3/26/07 8:56pmMessage 3 of 5
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VNCRUISER
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North Hills, CA - USA
Joined: 6/12/2003
Posts: 515
Vette(s): 1972 T-Top
           I think this may have come off of a heater delete car?  Hey, Sportivo, what's your manifold look like?
                          Reid   '72 T-top

    Reid    '72 T-top

www.wildbunchcarclub.com
www.vannuyscruisingassociation.com


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LT-1 intake with no heater hose fitting

Posted: 3/27/07 1:29pmMessage 4 of 5
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Sportivo
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San Pedro, CA - USA
Joined: 5/26/2005
Posts: 239
Vette(s): 1971, LT-1, T-top, 4-speed (M21), Mulsanne Blue, 3.70 rear, mostly original (sidepipes). 2006, Daytona Sunset Orange Coupe.
I have a pic, but I don't know how to get it small enough to post!
 I CAN tell you this..........the heater hose connection is on the front right side of the manifold, just "below" where the thermostat drops in.
Sportivo2007-03-27 15:30:23


(click on image to see a bigger version)

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LT-1 intake with no heater hose fitting

Posted: 3/27/07 5:30pmMessage 5 of 5
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F4Gary
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Grapevine, TX - USA
Joined: 8/26/2006
Posts: 1539
Vette(s): 1972 LT-1 convertible with factory air. 2017 Black Rose Grand Sport M7 convertible.
Upon further review, I'm sending this manifold back.  I found a crack at the base of the #1 intake runner.  The heater hose hole has been welded up.  So I am back in the market for a 71-72 LT-1 intake manifold (3959594). 
 
Just curious, is there an aftermarket direct replacement, i.e. with the correct choke rod fitting, for this manifold?

   

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