Why coolant through tb
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Elder User
Joined: May 2002
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From: Claremore, Ok 74017
Why coolant through tb
Why does the coolant run through the tb on our trucks? Doesn't cooler air produce more power, so why heat it with the coolant? Has anybody routed past this without any computer problems? Thanks for any input.
Post Fiend
Joined: Nov 2002
Posts: 9,987
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From: Memphis, TN
Why coolant through tb
It's to keep the throttle body from icing up for them NORTHERNERS! 
Us boys down SOUTH don't need that crap! 
Seriously, it won't affect the computer one way or the other, and the incoming air is exposed to that MILD heat for so little time, it doesn't really affect performance.
Us boys down SOUTH don't need that crap! Seriously, it won't affect the computer one way or the other, and the incoming air is exposed to that MILD heat for so little time, it doesn't really affect performance.
Post Fiend
Joined: Nov 2002
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From: Memphis, TN
Postmaster
Joined: Jun 1999
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From: Lee's Summit MO
Why coolant through tb
Originally posted by steve83
Nope.
Nope.
BTW, is the coolant line the hot or cool line coming from the radiator?
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Joined: May 2002
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From: Smithton
Why coolant through tb
[QUOTE]Originally posted by Pastmaster
[B]Why wouldn't it be? If the coolant passes through the TB when it's cold to keep it from freezing, why would it not cool the TB when it's hot?
I agree- I think it does both. That egr gets HOT!! And everybody knows that an engine sucking cool air will run better than an engine sucking hot air. I know that 190 degree coolant is not exactly cool, but it is a lot cooler than 850(or more) degree exhaust.
[B]Why wouldn't it be? If the coolant passes through the TB when it's cold to keep it from freezing, why would it not cool the TB when it's hot?
I agree- I think it does both. That egr gets HOT!! And everybody knows that an engine sucking cool air will run better than an engine sucking hot air. I know that 190 degree coolant is not exactly cool, but it is a lot cooler than 850(or more) degree exhaust.
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Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Why coolant through tb
Originally posted by Pastmaster
Why wouldn't it be? If the coolant passes through the TB when it's cold to keep it from freezing, why would it not cool the TB when it's hot?
BTW, is the coolant line the hot or cool line coming from the radiator?
Why wouldn't it be? If the coolant passes through the TB when it's cold to keep it from freezing, why would it not cool the TB when it's hot?
BTW, is the coolant line the hot or cool line coming from the radiator?
The air passing thru the throttle body isn't exposed to that tiny slice of aluminum NEARLY long enough to change the AIR temperature, and if that was the purpose, the inside of it would be finned to transfer heat to/from the air.
But ALL that air rushing past the aluminum can chill it and cause ice to form (locking the throttle wide open), UNLESS there's a plate with hot water flowing thru it bolted tightly in between the large aluminum surfaces. And aluminum can transfer a LOT of heat.
Since the EGR only opens occasionally, the heat it carries in is small compared to what the rushing intake air can take away, and the exhaust cools a lot coming thru that thin-walled steel tube - that's why it has that insulation, keeping all that heat from melting the nearby vacuum lines and wire insulation.
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Elder User
Joined: May 2002
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From: Claremore, Ok 74017
Why coolant through tb
Isn't the tb close enough to the engine that you should not have the fear of freezing into a wide open position. Not only that but it also has the air off the radiator flowing over to further help it from freezing? An does the air actually flow at a fast enough rate to drop its temperature to lock the Tb open?
Posting Guru
Joined: Jul 2002
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From: Vancouver WA
Why coolant through tb
The carb on my '66 Mustang used to freeze up on me in the cold weather because I had removed the warm air intake tube to put on an open filter. The carb was a lot closer to the engine than the TB is on these engines.
Post Fiend
Joined: Nov 2002
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From: Memphis, TN
Why coolant through tb
Originally posted by Ford Truck Racer
Isn't the tb close enough to the engine that you should not have the fear of freezing into a wide open position.
Isn't the tb close enough to the engine that you should not have the fear of freezing into a wide open position.
Originally posted by Ford Truck Racer
An does the air actually flow at a fast enough rate to drop its temperature to lock the Tb open?
An does the air actually flow at a fast enough rate to drop its temperature to lock the Tb open?
But the conditions have to be just right for a significant amount of ice to form - they've just added the little heater to make it impossible.
New User
Joined: Mar 2003
Posts: 1
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From: USA
Why coolant through tb
i have a small hole in the "freeze" plug in the side of the tb, any suggestions on how to replace this? mainly, can i do it w/o removing the tb? any suggestions would be GREATLY appreciated