Hot Water Bypass?? - Ranger-Forums - The Ultimate Ford Ranger Resource


2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

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Old 12-05-2006
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Hot Water Bypass??

I did a search on this already and didn't find much info. Can some one please give me some more info????
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Old 12-05-2006
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There are two small coolant lines that run to the top of the aluminum intake manifold to prevent throttle body icing. Some people remove these from the manifold and connect them together to bypass the manifold. The theory is that the cooler manifold will allow a denser charge and more power. It is certainly directionally correct for performance but the gains are tiny.

This will only work on the aluminum manifold trucks that have the coolant lines. Since it can result in a stuck throttle plate, it is not the best idea that ever came along.
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Old 12-05-2006
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ok...thanks....so do i need to plug the lines on the intake manifold or just leave them as is?
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Old 12-05-2006
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Sweet...thanks for your help. I will do this tonight...just to stop the anoying leak.
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