Why: hot water in the throttlebody?

[iBoost5o]

Does anyone know why ford put hoses from the hot water heater lines into the throttle body?

I have a friend who took his off and the throttle/intake is actually cooler. It was an obvious diffrence. Performance wise *shrug.* Anyways - i'm pretty curious about it .

thanks,
iboost5o

 

[Mustang5L5]

Cool off the hot EGR gases and prevent icing in the winter.

It's been debated hundreds of times. Taking the lines off a stock motor does nothing.

Now if you have your EGR bypassed and don't really drive around on humid 40 degree days then you can take em off and not worry about them.

 

[iBoost5o]

Cool off the hot EGR gases and prevent icing in the winter.

It's been debated hundreds of times. Taking the lines off a stock motor does nothing.

Now if you have your EGR bypassed and don't really drive around on humid 40 degree days then you can take em off and not worry about them.

Well why just the throttle body then? any tech info i can read on this?

thanks.
iboost5o

 

[Mustang5L5]

Well why just the throttle body then? any tech info i can read on this?

thanks.
iboost5o

It's not the throttle body. The coolant lines go into the EGR spacer. See the gold colored sensor bolted to the back of the intake. That releases hot gases into the air charge at that location. The EGR gases come up through the intake manifold and swirl around inside the EGR spacer before getting released inside the intake. These gases are hot..maybe 400-500 degree. Coolant temp is 180-200 degrees. Taking the coolant hoses off while leaving the EGR intact is pointless.

 

[iBoost5o]

Well, I learned something new today . Thanks man.

iboost5o

 

[Michael Yount]

Of course, the Cobra intake has the egr valve as well, but no coolant lines from the factory. There seems to be no dominant line of reasoning as to whether the lines are there to cool off the spacer, or to heat up the throttle body. Although, if someone twisted my arm, I'd vote for the former. Seems like if you wanted to prevent icing, you wouldn't want the car to have to run for 5-10 minutes to get warm enough coolant to do you any good.

 

[HISSIN50]

Seems like if you wanted to prevent icing, you wouldn't want the car to have to run for 5-10 minutes to get warm enough coolant to do you any good.

i think we have kicked this idea a time or two before.

i would have thought if that (de-icing) was the desire, they would have used a heat riser off the headers instead (seems like it would get hot faster) - and they could use a wax button in the riser to close the 'door' when the car achieves operating temps.
i also think it is for cooling the EGR. i have also been told that it helps cool the intake charge (via cooling the EGR housing) - some have disconnected the lines and had intake temps rise enough to help cause some detonation.

im not smart enough to know if this is true or not - just more fodder for y'all.

 

[ponyboy302]

I learned this in my Atech class. The reason why its there is the same reason that you have a thermostat. You can take the thermostat out of your can and itll run cooler. Only problem is your car was meant to run at a certain temperature. Anything other then that temp will throw your system off. Or so says the teacher in my Atech class.