Allow the engine to cool down before attempting to open the cooling system.

You might also want to drain out some of the DexCool before performing this installation, it will minimize the amount of fluid loss and thus minimize the mess you will have to clean up. See instructions for radiator draining on the "Installing the 178 Degree Thermostat" page.

OK, let's do it.

On the bottom side of the throttle body are two coolant lines, one comes from under the intake manifold to the throttle body (short hose) and the other comes from the radiator (long hose) and goes to the throttle body. These lines allow the hot old DexCool to flow in and around the throttle body and warm up the air as it enters the engine.  The purpose of the bypass kit is to join together the long hose from the radiator with the short curved hose that comes from the coolant manifold pipe under the intake manifold. Bypassing the coolant from flowing through the throttle body keeps the air entering the engine a bit cooler. Since we all know that cooler air is more dense and thus contains more oxygen, it should mean more POWER! That's what we want - POWER!

I found that it is WAY EASIER to install the bypass tube with the air filter and MAF sensor removed. So Loosen the hose clamp at the throttle body, unplug the intake air temperature sensor and the mass air flow sensor connectors. Give the air box a little pull from the frame (do this from in front of the car, you may need to pry gently with a screw driver to get the box to unplug from the rubber bushings). It is firmly mounted! With this stuff out of the way, it is easy to see and feel what you are doing.

The installation is real easy and takes just a few minutes - it's just getting there that is a pain.

After the bypass tube is installed, replace all the stuff you took off, top off or replace the coolant you drained and you are off.

Refer to the "Radiator Filling Instructions" on the "Installing the 178 Degree Thermostat" page.