Steam piping
Thread Starter
Melting Slicks
Joined: Aug 2014
Posts: 2,470
Likes: 460
From: East Windsor NJ
Steam piping
So I bought an LS6 intake from another forum member - yippee 
I have the ebay seller telling me I need only one of these not two. With only 1 pipe and 2 blockoffs aren't 2 ports being left "unbled?" Excuse my ignorance - I've worked on lots of engines but not one with "steam piping"
http://www.ebay.com/itm/320698877690?ru=http%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D320698877690%26_rdc%3D1
I have the ebay seller telling me I need only one of these not two. With only 1 pipe and 2 blockoffs aren't 2 ports being left "unbled?" Excuse my ignorance - I've worked on lots of engines but not one with "steam piping"
http://www.ebay.com/itm/320698877690?ru=http%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D320698877690%26_rdc%3D1
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2020 Corvette of the Year Finalist (performance mods)
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if your current crossover is the one that goes under the intake and connects all 4 steam ports you can keep it, actually I would suggest keeping it... you can remove the ribs off the bottom of the ls6 intake and it will clear just fine
Team Owner
Joined: May 2001
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
So I bought an LS6 intake from another forum member - yippee
I have the ebay seller telling me I need only one of these not two. With only 1 pipe and 2 blockoffs aren't 2 ports being left "unbled?" Excuse my ignorance - I've worked on lots of engines but not one with "steam piping"
Corvette Camaro LS6 LS2 Coolant Crossover Pipe Kit LS1 12602544 12602540 | eBay
I have the ebay seller telling me I need only one of these not two. With only 1 pipe and 2 blockoffs aren't 2 ports being left "unbled?" Excuse my ignorance - I've worked on lots of engines but not one with "steam piping"
Corvette Camaro LS6 LS2 Coolant Crossover Pipe Kit LS1 12602544 12602540 | eBay
Thread Starter
Melting Slicks
Joined: Aug 2014
Posts: 2,470
Likes: 460
From: East Windsor NJ
Acct Suspended APR 2026 by request
Joined: Dec 2010
Posts: 10,367
Likes: 1,272
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
you can do that but I personally find it easier to remove the ribs from the intake rather than risk damaging the steam pipe... the ribs will pop right off flush with the bottom and the factory intakes are structurally strong so I wouldn't worry about reducing the integrity
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
There are several way to deal with this issue.
I have done them all with success.
1. PUSH the steam piping DOWN so that it is below the level of the tall fasteners that secure the valve valley cover to the top of the engine. The fasteners don't contact the manifold, If the piping is below the bolts, YOUR GOLDEN!
PRESSED DOWN BELOW THE BOLT HEADS:
2. I have a ZO6 and I wanted to ADD the piping back to the rear cylinders. SO,, I purchased an additional FRONT ZO6 steam cross over pipe, flipped it around and installed it on the rear steam vents. Connected it to the front with a metal T fitting:
LOW PROFILE BOLTS, FLIPPED FRONT STEAM PIPE:
3. If you install a FAST intake the bottom pan is MUCH closer to the valve valley pan and they even give you LOW PROFILE Valve Valley bolts. So, you would HAVE TO get rid of the metal steam piping if you have a FAST Manifold.
I have done them all with success.
1. PUSH the steam piping DOWN so that it is below the level of the tall fasteners that secure the valve valley cover to the top of the engine. The fasteners don't contact the manifold, If the piping is below the bolts, YOUR GOLDEN!
PRESSED DOWN BELOW THE BOLT HEADS:
2. I have a ZO6 and I wanted to ADD the piping back to the rear cylinders. SO,, I purchased an additional FRONT ZO6 steam cross over pipe, flipped it around and installed it on the rear steam vents. Connected it to the front with a metal T fitting:
LOW PROFILE BOLTS, FLIPPED FRONT STEAM PIPE:
3. If you install a FAST intake the bottom pan is MUCH closer to the valve valley pan and they even give you LOW PROFILE Valve Valley bolts. So, you would HAVE TO get rid of the metal steam piping if you have a FAST Manifold.
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From: Dear Karma, I have a list of people you missed.
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1/4 mile/AutoX
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From: Buffalo Texas
Team Owner
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From: Dear Karma, I have a list of people you missed.
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The Joe Six-Pack guys should just notch out the underside of their Z06 manifolds and keep the LS1 pipes. The FAST guys have different needs.
1/4 mile/AutoX
Joined: Jun 2014
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From: Buffalo Texas
There's other companies also making billet block off plugs (and other specialized fittings) with 1/8" NPT threads for fabbing up external lines, rear to front, etc. Blower cars, sheet metal intake cars, etc, etc all have different needs so lots of options out there, especially on the external lines side of things.
The Joe Six-Pack guys should just notch out the underside of their Z06 manifolds and keep the LS1 pipes. The FAST guys have different needs.
The Joe Six-Pack guys should just notch out the underside of their Z06 manifolds and keep the LS1 pipes. The FAST guys have different needs.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Just a note: When I installed my FAST 90.. I wanted to be ABSOLUTY POSITIVE that NOTHING was going to prevent it from fully seating on the heads. Before I installed the intake manifold gaskets, I sat the manifold on the heads.
The ONE corner where the rubber hose is connected to the rear crossover (passengers side) touched the manifold base. A little very minor bending AFT on the pipe and that allowed the manifold to sit FLAT on the head surface.
ALWAYS Double Check and make SURE that it will seat without any obstructions.. You will be AMAZED at how many people CRACK their manifolds after they FORCE the to seat with the bolts.
Bill
The ONE corner where the rubber hose is connected to the rear crossover (passengers side) touched the manifold base. A little very minor bending AFT on the pipe and that allowed the manifold to sit FLAT on the head surface.
ALWAYS Double Check and make SURE that it will seat without any obstructions.. You will be AMAZED at how many people CRACK their manifolds after they FORCE the to seat with the bolts.
Bill