Throttle Body Coolant Bypass

DON'T DO THIS WHEN YOUR ENGINE IS HOT, MAKE SURE IT IS COLD TO THE TOUCH

What is this? the coolant  from the engine was designed to run through the throttle body to heat up the throttle body so the throttle butterfly does not get frozen shut or cause any problems (if you are live at a very cold place) in the morning. When your engine already warm up, you don't want the coolant to keep heating up the throttle body. Well in hot climates  (like Texas), obviously frozen throttle plate is not going to happen and what in actuality happens is it heats up the throttle body and the intake air temperatures rise (which is adverse to power gains) and so we do not want that. We would like to shut down the coolant when the engine already warm up, but if we can't do that, then we bypass the whole thing. This is a very popular modification. Do a search on the net, you will find LOT of info on how to do this on many different car.( except Lexus, because you only see it here)

What do you do? well its simple there is an inlet and outlet to the throttle body. Simply bypass the inlet and outlet, connect them together and bypass the throttle body, in another word, no hot coolant will flow through the throttle body==> intake air is not heat up anymore==> more power

Some of the links:
http://www.ws6.com/mod-8.htm
http://www.westol.com/~brettd/corvette/tbcool.html

Part Need:
- 1 small 5/6" hose clamp
- 1 PVC valve (used as connecting adapter, I used Purolator PV1009), you need to knock out the valve inside (easy done with a screw driver)
- Vacuum valve caps (5/6", 1/4")

Remove the engine cover, intake pipe, release the throttle cable
-Remove 4 10mm bolts as showed

-Disconnect the wiring hardness to the throttle body (labeled A1,A2...)
Slowly remove the throttle body in the direction showed below, once it's free from the bolts, you can move it around freely

The goal is to short these 2 lines together and bypass the throttle body

Diagram showed where you have to disconnect the line and connect the back through the PVC adapter

Insert the PVC valve adapter to the lower line, secure with the existing clamp

I covered the lower hose line with some electrical wire wrap (not require, but just to be safe home engine heat)
Connect to lower line to the upper line with the PVC adapter, secure the clamp. You are done.

Good luck.

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