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Generation III Internal Engine
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Old 05-01-2010, 01:45 AM   #1
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Default LS6 Coolant crossover pipe

i am going to be installing a ls6 intake,LS6 valley cover and crossover pipe. i ordered 4 of the steel gaskets w/ orings for the rear plugs and pipe but i noticed that the new ls6 pipe has o-rings already on the bottom of the the plug. do i need to use a steel gasket with the already supplied oring on the pipe or do i just use the oring that came on the pipe. i know i will have to use 2 of the steel gaskets with the rear plugs.
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Old 05-01-2010, 04:05 AM   #2
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The new LS6 crossover tube you have already has o-rings and is ready to install as is; do not use the old style plate gaskets with the new tube.

You could install a crossover tube at the rear, and plumb both tubes to a T or Y fitting, and then on to radiator neck.
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Old 05-01-2010, 09:59 AM   #3
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Quote:
Originally Posted by joecar View Post
The new LS6 crossover tube you have already has o-rings and is ready to install as is; do not use the old style plate gaskets with the new tube.

You could install a crossover tube at the rear, and plumb both tubes to a T or Y fitting, and then on to radiator neck.
What He said, On my set I didnt have to use a single gasket, my tube and block offs all have o-rings on them.
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Old 05-01-2010, 08:18 PM   #4
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Why not just modify the intake and use the stock lines?
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Old 05-02-2010, 06:01 AM   #5
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I don't think he has the stock line.
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Old 05-02-2010, 08:20 AM   #6
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This was a design change a few years back.
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Old 05-02-2010, 08:34 AM   #7
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I just did this too and on my old one it had the plates w/ gaskets and o-rings on the tubes them selves so I went back the same way, I have no leaks? Also I used two front tubes and tied them together in the front with a brass T, I was concerned about reading about the #7 cylinder issue so I went this way.
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Old 05-02-2010, 01:14 PM   #8
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Quote:
Originally Posted by Black 99 Bird View Post
Why not just modify the intake and use the stock lines?
i didnt want to butcher my $624.00 slp ls6 intake.
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Old 05-02-2010, 01:16 PM   #9
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Quote:
Originally Posted by 99'CajunFirehawk157 View Post
I just did this too and on my old one it had the plates w/ gaskets and o-rings on the tubes them selves so I went back the same way, I have no leaks? Also I used two front tubes and tied them together in the front with a brass T, I was concerned about reading about the #7 cylinder issue so I went this way.
which way did you place the rear crossover pipe,outlet facing forward or torwards the firewall?
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Old 05-02-2010, 01:25 PM   #10
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Quote:
Originally Posted by joecar View Post
You could install a crossover tube at the rear, and plumb both tubes to a T or Y fitting, and then on to radiator neck.
Quote:
Originally Posted by 99'CajunFirehawk157 View Post
I used two front tubes and tied them together in the front with a brass T, I was concerned about reading about the #7 cylinder issue so I went this way.
This is exactly what I did, as well. Not that I'm constantly ripping on my car, but I didn't want to take the chance of starving any of the cylinders of coolant.

My setup looks nearly identicle to the picture in 99'CajunFirehawk157's post. Turned out really well.

EDIT: To answer your question in the post above: I placed the rear line with the exit facing the firewall and plumbed some fuel line where the stock PCV system used to run, (I also upgraded to the LS6 Valley Cover) between the passenger side head and the intake.
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Old 05-02-2010, 01:32 PM   #11
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Quote:
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which way did you place the rear crossover pipe,outlet facing forward or towards the firewall?
What I Did was I got 6 ft of 1/4 fuel line, since you cant find 1/4 heater hose OR I couldn't anyway, then hooked it up using a worm gear clamp, then bolted it down facing towards the firewall. I then left the 6 ft of hose loose out of my way until after all else was done then I routed it on the drivers side fuel rail area to the front of the car. YMMV
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Old 05-02-2010, 02:32 PM   #12
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Quote:
Originally Posted by 99'CajunFirehawk157 View Post
What I Did was I got 6 ft of 1/4 fuel line, since you cant find 1/4 heater hose OR I couldn't anyway, then hooked it up using a worm gear clamp, then bolted it down facing towards the firewall. I then left the 6 ft of hose loose out of my way until after all else was done then I routed it on the drivers side fuel rail area to the front of the car. YMMV
might have to do this instead
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