Throttle body coolant pipe bypass...


ek_mo

ek_mo

Jordan 331
Joined
Jan 26, 2009
Messages
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What are the advantages (if any) of disconnecting the coolant pipe from the throttle body and run it straight to the IACV instead? I've seen this done but I can't remember where and wasn't too sure why it was done. Any info on this would be great.
 
stops it heating up the air before it enters the IM! :nice:
 
any photo's of it?something i wana do and searched but cant get any good pics of it being done.There was a pic on here somewere of it
 
Any disadvantages? Worth doing this? why does coolant pass through it in the first place if it's going to heat up the I'm :/ my TB's off atm and so is my IACV so I might do this..
 
I have done this, it works well in better climates.
The reason Honda did this is to heat the TB butterfly, keeps it from freezing closed.
You have been warned. lol

There are 2 ways to do this too. You can bypass the TB and go direct to the IACV. Or bypass the IACV and TB. This is the better way in my eyes, as it not only keeps the TB cool, it also keeps the IACV cool, which is bolted up to the intake mani and keeping that temp low as well. Not to mention keeping the electronics cooler in the IAVC prolonging its life.

But if it gets close to freezing in your area, do not do this mod.
 
this is grand in rally cars as the tb would be in WOT but as a daily driver, it could cause the butterfly to freeze at part throttle, its better suited for warmer climates, the reason its done in rally cars is cold air is more dense and therefore more oxygen and this creates more power... e.g. do you ever drive your car fast on a cold night? you'll find your car is faster
 
Thanks for the info guys! Ah man not sure if I should do this...
 
True, I'll go for it :D I'll be bypassing both the TB and IACV. Now to find a pipe long enough and some plugs for the TB and IACV.
 
ek_mo said:
True, I'll go for it :D I'll be bypassing both the TB and IACV. Now to find a pipe long enough and some plugs for the TB and IACV.
Click to expand...

If you need it, I can post a pic of my current setup and post it here only if you need it.
No need to use plugs [vacuum plugs] the tubes on the IACV, they point down anywho.
 
I was advised against this for the UK, especially since we sometimes see freak temperatures of down to -10 degrees C in winter. But if people are doing it I guess the freezing problem can't be that much of an issue....
 
tama666 said:
If you need it, I can post a pic of my current setup and post it here only if you need it.
No need to use plugs [vacuum plugs] the tubes on the IACV, they point down anywho.
Click to expand...

Yes please pics would be great sir :nice: Where can I buy a pipe that fits and is long enough for this mod?
 
I've done mine,

Was like it all the way through winter, -17.5c in scotland this year. It was fine not a single hiccup! :)
 
Jimbo said:
I've done mine,

Was like it all the way through winter, -17.5c in scotland this year. It was fine not a single hiccup! :)
Click to expand...

Great stuff :nice: Have you bypassed both the TB and IACV?
 
If you look at the IACV, you will see 3 connections, 2 are coolant and one is electrical. Leave the electrical connected. :)

Follow both coolant lines from the IACV you will find one leads back to the head[outlet] and the other to the block[inlet].

What you need to do is connect the [outlet] from the head to the [inlet] to the block directly with one hose.

You can pick up coolant hose from any auto parts store.
 
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Bit of a rubbish diagram, but is this what I do? Red shows how it is at the moment and blus shows bypass route...

diagramcooant.jpg
 
ACE, ^^correct^^. And plug back in the electrical connector to the back of the IACV, done and done.

this is the cleanest most effective way to do this conversion/modification. keep your old hoses and in case you want to revert back...i already have lost mine....lol
 
Awesome thanks! Slightly off topic but i've taken off the TB and the IACV and noticed the Intake mani is full of dirt. I've cleaned whatever I can reach by spraying carb cleaner on a rag and giving it a scrub but theres still quite alot of dirt on there. I really don't want to take off the IM is there anything I can use to clean it while it's still on or is taking it off the only option :/ Spraying carb cleaner in there a bad idea?
 
ek_mo said:
Awesome thanks! Slightly off topic but i've taken off the TB and the IACV and noticed the Intake mani is full of dirt. I've cleaned whatever I can reach by spraying carb cleaner on a rag and giving it a scrub but theres still quite alot of dirt on there. I really don't want to take off the IM is there anything I can use to clean it while it's still on or is taking it off the only option :/ Spraying carb cleaner in there a bad idea?
Click to expand...

Take your IM off and get that out ASAP. Do not do clean this while the dirt is in the IM and on the engine, it may get to your combustion chamber--not good. Take the IM off first.
While you are at it, install the Hondata heat shield...;)
 
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