Throttle Body Coolant Bypass – Guide

Throttle Body Coolant Bypass – Guide

If you are trying to bypass the throttle body coolant system, there is a specific protocol that you must follow. The throttle body is one of the components of the air system.

It draws in the air that circulates it in the rest of the engine. Air is responsible for the optimal functioning of the engine because it mixes with the fuel in the compartments.

How To Bypass Throttle Body Coolant

The throttle body provides a channel to that air.

The throttle body coolant acts as an antifreeze. It comes in handy for colder climates and maintains the throttle body temperature.

The coolant structure is suitable enough to reach within the throttle body and circulate through the entire system.

The Necessity Of Throttle Body Coolant Bypass

If you live in a warmer region, there is no particular use in having a throttle body coolant.

The temperature is relatively moderate in such places, and there is no chance that the air within the throttle body will freeze.

Moreover, if you intend to place your car in storage, you do not need to keep the coolant active.

Furthermore, in some cases, the passage of coolant through the throttle body reduces performance.

Therefore, you should only keep it as a safety feature if you live in icy regions.

The throttle body coolant hoses provide a warm temperature to ensure that the plates do not freeze.

However, when the temperature in the coolant rises, it starts emitting heat.

The heat, in turn, affects the intake system that is responsible for transferring air to the manifold, where it mixes with the fuel.

Therefore, coolant passage through the throttle body reduces your vehicle’s horsepower. Hence various car owners prefer throttle body coolant bypass.

The Bypass Process

Following are the steps you should follow to conduct throttle body coolant bypass.

1. Loosen The Grip

The first step for throttle body coolant bypass involves loosening all the screws and bolts around the whole structure. Several clamps hold the coolant hoses in place.

These clamps prevent the formation of kinks that may later produce cracks in the pipes. The entire engine system is relatively compact.

Therefore, it is necessary to ensure that none of the components interfere.

Right below these hoses is the serpentine belt. So, these clamps keep the pipes from being rubbed on the belt.

These holders are present at the starting and ending point of these pipes. Moreover, you can get a simple ranch or screwdriver to loosen these grips and remove them.

2. Remove The Throttle Body

Before conducting throttle body coolant bypass, you might have to perform some additional steps. These depend upon your car and model.

If you own a sedan car, it is unnecessary to carry out these instructions. However, if you have a jeep or SUV, you cannot avoid the step.

It is usually essential for cars with V6, V8, or V12 engines. These have more than one throttle body.

Therefore, there is an intricate system of coolants that is quite difficult to analyze.

Furthermore, in the Jeep case, the throttle body is present below. The intake system is on the top, and you can see the pipe.

Therefore, to allow the throttle body coolant bypass to work, you must remove all the components blocking the view.

These include the intake pipes that lead to the throttle body.

Once you set them aside, you can see the throttle body. In such cars, you do not have much space to work.

Therefore, you might have to remove the throttle body to access the coolant hoses.

Several bolts and clamps hold the throttle body and intake pipe that you must detach before proceeding further.

3. Find The Hoses

Few coolant hoses pass from the intake pipe. The coolant lines pass through the internal pipes in the throttle body.

The bypass coolant hose also passes through the cylinder head into the EGR, throttle body, and then back to the head.

The actual connection is secured with clamps and hooks. The exhaust gas recirculation (EGR) allows coolant to withdraw heat.

It is necessary to let the coolant pass through EGR. You should not remove the coolant entirely to carry out the throttle body coolant bypass effectively.

Only detach the part that runs through the throttle body. Keep the rest of the system intact.

Throttle Body Coolant Bypass


The standard tools required for throttle body coolant bypass are usually present in your garage. Following are some of the tools you will need to complete the process.


They will help you loosen the bolts on the clamps.


They will provide the optimal force for removing heavy bolts.

Light Source

A suitable torch or flashlight can help you find the exact points on the throttle body. It would help if you differentiated the coolant hoses from other pipes.

Therefore, always ensure that the entire throttle body system is visible.

Gimbal Ratchet

These are useful if your car has a throttle body deep into the engine. It will help you loosen the clamp grip when there is not much room to work.

It will help you target specific nuts without interfering with surrounding components.

Factors To Consider

You must consider the following essential details before performing throttle body coolant bypass.


Throttle body coolant bypass is not beneficial if you live in slightly colder climates. The temperature will freeze the plates, and your car will not start.

Therefore, you must carry out throttle body coolant bypass only if you live in a warmer climate where the temperature does not fall below 5°C.

Coolant Loss

The throttle body does not require coolant hoses if the temperature is not a factor. However, other engine parts need a sufficient coolant supply to function properly.

When you conduct throttle body coolant bypass, there will be a significant reduction in the coolant.

Therefore, after the success of throttle body coolant bypass, you must top up the coolant levels.

Recalibrating Throttle Body

If you separate throttle during the throttle body coolant bypass, you have the chance to clean it thoroughly.

You can find several aerosol sprays that target the dirt accumulated in the corners. Afterward, you must securely place the throttle body.

Do not cause any abrasive damage to the throttle body while cleaning it.

Any damage to the metal or its structure can hamper the function of the throttle body, which will, in turn, impact the working of your vehicle.

Therefore, you must ensure that whatever cleaning agents you use do not affect the metal and its properties. Securely place the throttle body back and fasten the bolts.


Throttle body coolant bypass requires certain levels of expertise. You must be familiar with the coolant hoses that pass through the body.

Do not target the coolant pipes that run through other engine parts.

Furthermore, coolant bypass does not engage with the nearby compartments while performing the throttle body.

Any scratch may result in fuel, air, or coolant leakage. After the bypass, you will notice increased horsepower and vehicle performance.

However, if your goal is to enhance the power, you will also have to target the manifolds.

Thus, throttle body coolant bypass is only helpful for increasing the vehicle power while living in warm temperature regions.