LT1-LT4 Modifications 1993-97 Gen II Small Block V8

head vent pipe.

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Old Nov 16, 2009 | 11:40 PM
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Default head vent pipe.

what does this thing do exactly? is it really needed?
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Old Nov 16, 2009 | 11:42 PM
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Good luck ever getting the system bled without it.

I'd like to know if anyone has tried to delete it before as well, and how that went.
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Old Nov 16, 2009 | 11:44 PM
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Do not remove it! Only way for steam to get out of the heads. You will get hot spots in the rear cylinder if you remove it.
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Old Nov 16, 2009 | 11:52 PM
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Originally Posted by LT1
Do not remove it! Only way for steam to get out of the heads. You will get hot spots in the rear cylinder if you remove it.
Ditto.
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Old Nov 16, 2009 | 11:55 PM
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i just have a filter on mine but its just a track car, ill find out when i do the build if it caused any problems
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Old Nov 16, 2009 | 11:59 PM
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Originally Posted by 86formula
i just have a filter on mine but its just a track car, ill find out when i do the build if it caused any problems
WTF? He's talking about the cooling system. Not the CCV system...
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Old Nov 17, 2009 | 12:18 AM
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well i wasnt planning on deleting it really, i just didnt know how it worked, mine doesnt look like it seals off perfect. so i didnt know if i would loose fluid out of it or what would happen
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Old Nov 17, 2009 | 12:32 AM
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Originally Posted by gregrob
WTF? He's talking about the cooling system. Not the CCV system...
lol sorry the question gets asked so many times that i just assumed that it was the CCV
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Old Nov 17, 2009 | 01:33 AM
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don't most aftermarket heads not have provisions for the crossover?
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Old Nov 17, 2009 | 07:37 PM
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LT1 specific heads do have the provisions.
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Old Nov 17, 2009 | 08:09 PM
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I am running a 6AN line from the back of the cylinder heads back to the intake. Much easier to take on/off whe you need to pull the heads
And improves coolant flow and reduces the temperature varience from front to back on the heads.

Last edited by Ray@Nitrous Outlet; Nov 17, 2009 at 08:49 PM.
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Old Nov 17, 2009 | 08:26 PM
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Originally Posted by gregrob
WTF? He's talking about the cooling system. Not the CCV system...
I was going to say, the last couple times I pulled the tube that connects the heads in the back I had coolant in my lines, not air, lol!
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