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Coolant steam vent bypass to upper radiator neck

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Old Jul 30, 2022 | 02:04 PM
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Default Coolant steam vent bypass to upper radiator neck

Since I'm swapping in a gen 4 with a 2001 radiator in my Z28 can I safely route the front steam vent to the upper radiator? (This is by using the original steam vent from the LS1). Originally this went through the LS1 throttle body but I have a NW 92mm without the coolant fittings. I searched around and it appears that this is a common mod but wanted to double check.
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Old Jul 30, 2022 | 09:06 PM
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Originally Posted by Sunset01Z
Since I'm swapping in a gen 4 with a 2001 radiator in my Z28 can I safely route the front steam vent to the upper radiator? (This is by using the original steam vent from the LS1). Originally this went through the LS1 throttle body but I have a NW 92mm without the coolant fittings. I searched around and it appears that this is a common mod but wanted to double check.

do you mean upper radiator hose? Yes you can do that. I bought a 1.5” union with a 1/8”npt hole. Installed a barb fitting and it works fine.
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Old Jul 31, 2022 | 11:33 AM
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Originally Posted by The0nlyon3
do you mean upper radiator hose? Yes you can do that. I bought a 1.5” union with a 1/8”npt hole. Installed a barb fitting and it works fine.
Yes. I figured we can make a fitting and just run it to the upper rad hose. Based on my research this will let the heads vent air pockets up and out into the system
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Old Aug 2, 2022 | 03:39 PM
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I drill and tap for 1/8" npt thread near the pump outlet and run it there. No hose couplings or hoses away from the engine.
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