Throttle Body Bypass

[bigdaddymike745]

Has anyone performed the Throttle Body Bypass?

I have read up on it online and am just wondering if its worth doing

[Super Kaioken]

what is it exactly?

[JustAnotherAsian]

throttle body coolant by-pass?

[Gellenole]

I'm actually thinking about doing this right now.

Here are the instructions I got, but no pics -- if anyone can provide any pictures that would be great. Dunno if it differs too much from V6 to V4.

I didn't want to create another thread, so reviving an old thread using the search tool =D

Since I don't live in a snowy place and temps don't go below 40's here, it's not bad. It sounds promising, but dunno about any internal damage. Anyone have any experience with Throttle body coolant bypass?

There are 2 coolant lines going in/out on the throttle body. Find where they originate, and connect a line directly from one to the other, which leaves the throttle body open. Than plug those holes, or get some line and just connect them together.

It bypasses the coolant from flowing to your TB, which creates less heat there, since there is no hot fluid flowing through.

[lammydi]

Originally Posted by Gellenole

I'm actually thinking about doing this right now.

Here are the instructions I got, but no pics -- if anyone can provide any pictures that would be great. Dunno if it differs too much from V6 to V4.

I didn't want to create another thread, so reviving an old thread using the search tool =D

Since I don't live in a snowy place and temps don't go below 40's here, it's not bad. It sounds promising, but dunno about any internal damage. Anyone have any experience with Throttle body coolant bypass?

The engine was design to have the coolant pass throught the TB. Was the manufactor intention to "cool" the TB? If so, wouldn't by pass the TB cause it overheated? I don't know much about engine so please explain the following:
1. The way stock has it. Coolant goes into and ouf of the TB.
What is the purpose of that designed?
2. The mod you are trying to do which is By Pass the coolant from the TB.
What is the purpose of the mod?
Thanks.

[Gellenole]

Originally Posted by lammydi

The engine was design to have the coolant pass throught the TB. Was the manufactor intention to "cool" the TB? If so, wouldn't by pass the TB cause it overheated? I don't know much about engine so please explain the following:
1. The way stock has it. Coolant goes into and ouf of the TB.
What is the purpose of that designed?
2. The mod you are trying to do which is By Pass the coolant from the TB.
What is the purpose of the mod?
Thanks.

From what I remember, correctly if I am wrong/mistaken/etc, this bypass caused the TB to be cooler. The coolant going to the TB would be hot and not cold and cause it to not go below a certain temp from what I thought. But because the coolant coming to the TB would be warm, it would cause the air to go hot -- thus reducing power/push whichever terminology anyone uses.

So if we bypass the coolant flow to the tb, the air flowing through wouldn't be as hot.

This is just from what i've read, whether it's wrong or not I dunno. If it's correct -- it's the cheapest mod in the world and it wouldn't hurt to try it if nothing harmful happens.

[lammydi]

Originally Posted by Gellenole

From what I remember, correctly if I am wrong/mistaken/etc, this bypass caused the TB to be cooler. The coolant going to the TB would be hot and not cold and cause it to not go below a certain temp from what I thought. But because the coolant coming to the TB would be warm, it would cause the air to go hot -- thus reducing power/push whichever terminology anyone uses.

So if we bypass the coolant flow to the tb, the air flowing through wouldn't be as hot.

This is just from what i've read, whether it's wrong or not I dunno. If it's correct -- it's the cheapest mod in the world and it wouldn't hurt to try it if nothing harmful happens.

Thanks bud. If that the case, I understand the purpose of the mod.
It just doesn't make sense the Toyota engineers designed to have the coolant go through the TB only to make it hotter???
So if someone can explain my #1 question:
1. The way stock has it. Coolant goes into and ouf of the TB.
What is the purpose of that designed?

[Gellenole]

Originally Posted by lammydi

Thanks bud. If that the case, I understand the purpose of the mod.
It just doesn't make sense the Toyota engineers designed to have the coolant go through the TB only to make it hotter???
So if someone can explain my #1 question:
1. The way stock has it. Coolant goes into and ouf of the TB.
What is the purpose of that designed?

Np, i just read this up while just running around some modding sites.

Some cars are in cold areas, the coolant keeps it above freezing, the bypass will let it go to extremely low temps if you live in a really cold area. I think the TB will fail at low temps. Again correct me if i'm wrong.

[JSM1284]

But with the throttle body not properly cooled, it will get too hot, causing it to warp, and causing the butterfly to not open/close properly. Also the excessive heat will damage the electronics on the throttle body. DO NOT DO THIS "MOD" Unless you like to replace expensive parts.

[lammydi]

Originally Posted by JSM1284

But with the throttle body not properly cooled, it will get too hot, causing it to warp, and causing the butterfly to not open/close properly. Also the excessive heat will damage the electronics on the throttle body. DO NOT DO THIS "MOD" Unless you like to replace expensive parts.

Thank you. I knew there has to be a logical reason why it was designed the way it was.

[TRD VVTi]

Originally Posted by JSM1284

But with the throttle body not properly cooled, it will get too hot, causing it to warp, and causing the butterfly to not open/close properly. Also the excessive heat will damage the electronics on the throttle body. DO NOT DO THIS "MOD" Unless you like to replace expensive parts.

That's funny as hell!!! Not one single thing in your post is correct!

Yes, performing the throttle body coolant bypass will net a very small gain. You will never feel it and it might not even show up on the dyno.

Coolant being circulated through the throttle body is to warm it! It's not to cool it. This prevents icing of the throttle body.

When the vehicle is running the throttle body is actually cooled by incoming air. The throttle body doesn't actuallly get warm because it's mounted on a plastic intake manifold which insulates it from engine heat. Being insulated and having cold are passing through it all the time keeps it cool. However, having hot coolant running through it does warm the incoming air charge. Performing the bypass is helpful in keeping the incoming air cooler. You may get slightly more horsepower, but you may also get slightly less fuel mileage.

I have performed that mod on my Formula many years ago and will probably do it to my Camry once I get down south again.

Edit: If you aren't sure if my statement is true or not just do a Google search on "throttle body coolant bypass". I can't believe how many people post inaccurate B.S. every single day. Some even cite lame certifications or say "I've done it" as a basis that their reply is factual and correct. It's not that hard people! If you don't know what you're talking about, read and learn instead of passing along bad information to other people that want to learn the facts/truth.

[Gellenole]

Originally Posted by TRD VVTi

That's funny as hell!!! Not one single thing in your post is correct!

Yes, performing the throttle body coolant bypass will net a very small gain. You will never feel it and it might not even show up on the dyno.

Coolant being circulated through the throttle body is to warm it! It's not to cool it. This prevents icing of the throttle body.

When the vehicle is running the throttle body is actually cooled by incoming air. The throttle body doesn't actuallly get warm because it's mounted on a plastic intake manifold which insulates it from engine heat. Being insulated and having cold are passing through it all the time keeps it cool. However, having hot coolant running through it does warm the incoming air charge. Performing the bypass is helpful in keeping the incoming air cooler. You may get slightly more horsepower, but you may also get slightly less fuel mileage.

I have performed that mod on my Formula many years ago and will probably do it to my Camry once I get down south again.

looks like i won't be doing this too =P I'm more concerned about gas right now than ever... last i checked 91 octane is at 3.80 *squint*

[Aceventura9586]

Originally Posted by Gellenole

looks like i won't be doing this too =P I'm more concerned about gas right now than ever... last i checked 91 octane is at 3.80 *squint*

Why are you even looking at the 91 octane anyway?

[v6secamry]

Originally Posted by Aceventura9586

Why are you even looking at the 91 octane anyway?

he probably has v6 (1mz-fe or 3mz-fe) like myself. which wants 91

[JSM1284]

Google Search for a "mod that someone is trying to sell kits for will give you any answer they want. Yes i do not disagree that it heats the TB to prevemt freezing, The TB doeas get quite hot from the engine, The coolant is also there to aid in cooling it.

I am not a "Know it all" or give bad info. I give info based on my education, and actual knowledge of how an automobile was designed, functions, and its characteristics. Your info is correct about the warming part to prevent freezing. I am not saying that doing the "Mod" will IN FACT damage the TB, but there is a chance it will. And again to correct TRD VVT-i's statement, the coolant IS there to aid in cooling the TB to prevent damage from excessive heat.

You also state that using the "I've done it" explanation is B.S. Hey, Did you read your own post? You actually used that comment that "You have done it" to your formula.....

And when it comes to "Read and Learn" before passing bad info, Maybe you need to quit reading the bad info and actually "Learn" by having a Degree in the field, and taking and passing extremely hard certification tests to earn an ASE. Not that im stating that to try and prove anything about myself, but I would put down some good money that you couldnt score higher than a 50% on one. I will even pay the $75 next test season(in the spring) for you to take one and see how very little you do know. Sure you can work on your car, add hi-po parts to your cars. But when it comes to diagnosing and repairing accuratley, good luck with your "google" knowledge.

And your right, "Lame certifications" dont mean anything. You would rather take your car to a dealer and have some dumbass that has no Certification or Degree in Automotive repair work on your car. That seems like a very good idea to me

Originally Posted by TRD VVTi

That's funny as hell!!! Not one single thing in your post is correct!

Yes, performing the throttle body coolant bypass will net a very small gain. You will never feel it and it might not even show up on the dyno.

Coolant being circulated through the throttle body is to warm it! It's not to cool it. This prevents icing of the throttle body.

When the vehicle is running the throttle body is actually cooled by incoming air. The throttle body doesn't actuallly get warm because it's mounted on a plastic intake manifold which insulates it from engine heat. Being insulated and having cold are passing through it all the time keeps it cool. However, having hot coolant running through it does warm the incoming air charge. Performing the bypass is helpful in keeping the incoming air cooler. You may get slightly more horsepower, but you may also get slightly less fuel mileage.

I have performed that mod on my Formula many years ago and will probably do it to my Camry once I get down south again.


Edit: If you aren't sure if my statement is true or not just do a Google search on "throttle body coolant bypass". I can't believe how many people post inaccurate B.S. every single day. Some even cite lame certifications or say "I've done it" as a basis that their reply is factual and correct. It's not that hard people! If you don't know what you're talking about, read and learn instead of passing along bad information to other people that want to learn the facts/truth.