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Throttle body cooler

This is a discussion on Throttle body cooler within the External Engine forums, part of the LSx Technical Help Section category; I am puting an ls1 in my blazer and was wondering what to do about the throttle bypass that goes ...

  1. #1
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    87 blazer

    Throttle body cooler

    I am puting an ls1 in my blazer and was wondering what to do about the throttle bypass that goes across the heads.

    Can I just plug them like the rear of the head or do I need to circulate the coolant?

  2. #2
    James Bond Spikito's Avatar
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    2001 3.8 Black - sold
    2000 SS Black M6

    look up "throttle body bypass"

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    The pipes coming out of the heads act as an air bleed, so I would not cap them off. You can bypass the throttle body and simply run the line back to the radiator. As this is a custom install, you may not have the bung on whatever radiator you are utilizing, so you may have to get creative.

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    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by pajeff02 View Post
    The pipes coming out of the heads act as an air bleed, so I would not cap them off. You can bypass the throttle body and simply run the line back to the radiator. As this is a custom install, you may not have the bung on whatever radiator you are utilizing, so you may have to get creative.
    Jeff is correct,,,, Usually on a custom swap, if you don't have a radiator with the appropriate return, the water pump is drilled and tapped for a return or I've also seen a return to the radiator overflow tank on some swaps.

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