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What is the part number for the ls6 coolant crossover lines?

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Old Apr 17, 2008 | 07:16 PM
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Default What is the part number for the ls6 coolant crossover lines?

I am going to install a fast intake and need the cross over lines to do it. Does any one have the part # for these?
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Old Apr 17, 2008 | 07:37 PM
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I believe this is the GM part #: 12602544

Mike
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Old Apr 17, 2008 | 08:29 PM
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Texas Speed has what you need if you don't want to hit up the stealership

http://www.texas-speed.com/shop/item...d=242&catid=12
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Old Apr 17, 2008 | 08:47 PM
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Not meaning to hijack but is can they be just blocked off or thats pretty much the only way to fix it?
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Old Apr 17, 2008 | 09:37 PM
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Let me know whats the easiest way to do this guys. If I don't have to have the ls6 coolant line I would rather not have to buy them.
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Old Apr 17, 2008 | 09:43 PM
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You can cut the line where it heads to the back of the valley cover. then weld/solder it to seal it. You only need to have the coolant circulating from the front of the heads to the radiator. for the back, cut the lines right at the plug and seal them the same way.

If you want the GM parts we have them:

http://www.thunderracing.com/catalog...vid=3&pcid=177

20-12602540 GM Coolant Plug - Used when converting from LS1 style intake to LS6 or LSX style intake. (2 required) $5.29

20-12602544 GM Coolant Crossover Pipe - Used when converting from LS1 style intake to LS6 or LSX style intake.$35.50

Thanks,
Shane
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Old Apr 18, 2008 | 01:40 PM
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gm dealership = 33.50
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Old Apr 20, 2008 | 04:24 AM
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Is the $33.50 for both the cross over and the plug or just the cross over line?
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Old Apr 20, 2008 | 10:06 AM
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Who has a pic of the setup because i dont understand what this coolant line remedies.
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Old Jun 22, 2008 | 03:12 AM
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It doesn't remedy any thing the stock lines are just in the way of the intake.
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Old Jun 22, 2008 | 11:11 AM
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Is It Possible For Your Car To Run Hotter With The Ls6 Lines Vs The Ls1 Coolant Lines.after I Changed From An Ls1 To Ls6 Itake Years Ago My Car Doesnt Run As Cool As It Used To.
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Old Jun 22, 2008 | 12:54 PM
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All parts needed to convert to the LS6 style coolant crossover tube:

12551933 - Coolant Seals, Head: 4 each required
12602540 - Coolant Air Bleed Plug, rear: 2 each required
12602544 - Coolant crossover pipe, LS6: 1 each required
11517591 - Rear Coolant plug bolts (M6 x 1.0 x 30mm): 2 each required
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