DIY Throttle Body Coolant By-pass

[MagTech]

Throttle Body Coolant Bypass
Edit s_tim_ulate: Please research the benefits yourself before undertaking this... nevertheless...
As the title suggest, this modification will bypass the coolant that passes in throttle body which in turn will benefit the air that passes through the intake manifold.

Under the normal engine operation and during this summer season, the coolant temperature reaches the boiling point and that same coolant passes through and heated the throttle body. This operation is very beneficial during the cold season, but during summer? I don’t think so…

This modification is 100% effective than buying an expensive gasket. This will cost you only a few dollars or even nothing if you have all the materials needed. The good thing about it is that anyone can do it in 1 hour or less.

Tools needed:

Pliers
+ and - screw driver
----------------------------------
Materials:
30cm length - 9mm fuel hose
2 - 8mm bolt
Teflon tape
----------------------------------

1. Remove the intake pipe from the throttle body and anything that you think will help you to move freely like the vacuum hose wiring etc.

This photo will show you the location of the coolant inlet

and coolant outlet from the throttle body


2. Grab one of your 8mm bolt and wrap it with teflon tape, make it thick so it will be tight fit and the hose won’t damage.


3. Remove the hose connection to the throttle body inlet and shut off with the bolt you prepared and clamp.



4. Do it the same with the outlet hose. Make sure you pointed up the hose so that the coolant won't spill too much.

[MagTech]

5. Grab the fuel hose and connect to the coolant inlet and the other end to the coolant outlet of the throttle body then clamp.


This is to give you an idea how it will be.


6. Return everything.


7. If you spilled a lot of coolant during this process, make sure to fill-up before starting the engine.

7.a Re-set the ECU (edited to include this step)

8. Start the engine to check for possible leak.

9. Drive around until the engine heats up, and then check again for leak.

10. Slowly touch the throttle body…it’s a lot cooler than before isn't it?

NOTE: Make sure to reconnect it from the original connection during cold season.
This is not a go fast modifications so don’t expect it, although some people noticed a gain after doing it.

[magnamechanic]

water cools better than air

a better way around it if you think its a problem is run a oil cooler before the water enters the throttle body

[MagTech]

All comments, suggestions, criticisms are welcome, please post

[reecho]

That coolant channel through the valve body is there for a reason and the problems you will get short and long term will overide the short term gains you get in performance....

[heathyoung]

Correct. The throttle body is heated for a few reasons...

1) Stops the throttle possibly icing up in winter (not really a problem in Australia)
2) Very important - Stops the PCV vapours from condensing on the throttle body and jamming up the throttle blade - a very effective way to 'un-highflow' a throttle body.

But if you were to make sure you remove the throttlebody regularly and remove the deposits from the blade/body, you should technically be OK.

Cheers
Heath Young

[MagTech]

water cools better than air

a better way around it if you think its a problem is run a oil cooler before the water enters the throttle body

I agree water cools better than air, but for the water 100deg+ that runs in the TB... I would rather shut it off during summer time. Cooler is a nice one but I'm always after for cheap/free and easy mod.

Peace

[Phonic]

Couldn't you just plumb a valve into the coolant inlet line just before the TB, so that you simply turn it on and off as needed?

[MagTech]

Couldn't you just plumb a valve into the coolant inlet line just before the TB, so that you simply turn it on and off as needed?

Yeah, some ppl do it but I'm after for the a free mod. This mod cost me nothing since I already got the things needed.