Hi,
I did the Throttle Body Coolant Bypass last week,
and instead of using the Straight Barb Hose Brass Union,
I decided to use the L Shaped (Elbow/90 degree Barb Hose Brass Union.
Using this L Shaped Union is better because The Inlet and Outlet Rubber Pipe would be easier to connect and do not have Kink.
I haven't took pictures of it after I install it in my car though,
but below is the picture of the Union fitting I am talking about,
and I also provide the link to buy this Union Fitting from Amazon.

The only thing that I am not comfortable is,
since I am still using the original CLAMP that came from the factory
and I feel that this 5/16 fitting do not fit as snug as the original factory fitting on the throttle body it self...
but this could be an illusion because when I install it (insert the brass union fitting into the hose), the coolant liquid were pouring from the pipe and might make it easier to insert (lubricate)... thus the illusion of lose...

still in the near future I am going to buy the hose clamp (with screw on it), so it will be tight... (perhaps later when I upgrade to K&N Typhoon cause right now I am too lazy to remove battery and airbox again just for replacing the hose clamp...)...

Now,
I am pretty sure the size for this fitting should be 5/16 though, because
if we use the 3/8, I think it is too big.
someone else here please correct me if I am wrong about the size of the hose.
Thanks.

 

So what is this mod for? Why would I want to do this?

 

It Bypass the coolant that goes to heat your Throttle Body to prevent Icing on your throttle body.
This mod is only for user in sunny climate (no snow) ie: California or Texas

So the intake air (incoming) temperature is lower.

But I personally think this mode only help
when your car start moving from a complete stop,
for example, you are waiting at red light, and when light turn green,
the incoming air from idle to rev is cold right away with this mod.
but
if you already run at higher rpm (cruising on the street),
the high flow of incoming air would not be affected by this heat even if you don't disconnect this hot coolant, because the high flow air at higher rpm will easily overcome the heating effect.

 

Post pics! I'll do it I live in Florida so no chance of freezing lol

 

Hi,
in order for me to give clear picture,
I need to take out the air box again (and the car battery),
so sorry, but I am not able to give you clear picture at this moment,
but here is a thread on doing this mod for GD (older Fit),
that have clear pictures.
https://www.fitfreak.net/forums/fit-...tml#post178113

(notice that in this GD modification the author use straight brass barb fitting)...

the different is in GE the intake and outlet of the coolant into the TB is NOT parallel like in GD
but in 90 degree angle.
just find two rubber hose that goes into lower part of TB and goes out at the lower part of TB.
oh, the intake rubber hose are connected to your thermostat,
so I am pretty sure it will be easy for you to find it.
Don't forget to buy some rubber cap to cap your intake/outlet coolant pipe on your TB (Throttle Body) to prevent dust/dirt from depositing in that pipe.
Who knows, that someday you might want to reconnect it again if you are traveling to colder climate area.
Have Fun doing the mod

 

I will look for it. I'll order the part from amazon and I'll ask if I have any questions. This way I could DIY for other people

 

Great,

Don't forget to order the Vaccum Cap,
either this:

or this Vaccum Cap package if you want some extra:

(you only need 2 vaccum caps though...)

and another good thing is to order the new clamp,
cause the factory clamp is kinda weak...

Have Fun

 

That's really expensive I'll just buy them at my local hardware store. Btw do you have a bmw? I have a 1988 535is

 

Hello,
I was trying to get the barb at Home Depot, and none of the Home Depot near me sell the 5/16 size barb, let alone an L elbow shape one,...
The nearest Lowes that sell the barb were 40miles away,
so I just give up and buy from Amazon...
for the vaccum cap... well after getting difficulties finding the barb,
I just gave up and buy at amazon...
I always have a feeling that if I buy $20 or less goods at Amazon,
it always came up more expensive then if you source it locally,...
Amazon most likely cheaper if I were buying over $20 goods...
I guess smart seller knew they could charge more margin for $20 or less goods without making people realize they are being rip off
but now you telling me about this,,... I now know I were being rip off hahaha

 

I have this bypass on my fit. I live in Ohio with temperatures that have been well below freezing, and have had no issues.

 

Finally Took Some Pictures Today,
The ByPass were tied with the Blue Tie Lock, notice also the inlet and outlet
pipe on the Throttle Body were cap with Rubber Cap.

 

Thanks for posting this thread up. It's a year or so old but still. I'm off today and will be doing this modification to my 2015 Fit. I can not get my air intake temperature to be the same as ambient, despite pulling the air directly from the hood. I have tried different setups with the same result.

I'm thinking the coolant is the cause of my air intake temperatures reaching 50-60F higher than ambient. I've seen ambient air temps around 60F with my intake temps getting to 120-125F, despite driving on the highway off and on. This is with the stock air box pulling in air from it's stock top bumper location, with the splash guard removed.

I'm very excited about this and am expecting positive results.