coolant bypass
Hotshot
Joined: Sep 2001
Posts: 11,958
Likes: 228
I have heard the same thing but no proof of that. Once when one of those lines was bad, I temporarily bypassed it and noticed no difference. I repaired it.
The purpose of those is to help the truck warm up in the winter and to keep the throttle body from icing up.
The purpose of those is to help the truck warm up in the winter and to keep the throttle body from icing up.
Hotshot
Joined: Sep 2001
Posts: 11,958
Likes: 228
We replied at the same time. Do you think it would actually make that much of a difference? I just figured that since my truck like most Fords is a little cold blooded in the winter time, so I thought it would be better to have it connected.
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
Ford says hoses are there to give more power as warm air will vaporize the fuel better.
You already have the more O2 from the stock cold outside air at this point so now you need to warm it.
They are not for throttle body icing, if the throttle body was to ice up it would do it long before the water temperature got up high enough to melt it.
Also the throttle body is not made with a venturi like it was with carburetors that drop the air temperature and cause icing between 33-38 degrees on humid days. So no air temperature drop with the throttle body and no icing.
You already have the more O2 from the stock cold outside air at this point so now you need to warm it.
They are not for throttle body icing, if the throttle body was to ice up it would do it long before the water temperature got up high enough to melt it.
Also the throttle body is not made with a venturi like it was with carburetors that drop the air temperature and cause icing between 33-38 degrees on humid days. So no air temperature drop with the throttle body and no icing.
Postmaster
Joined: Jan 2009
Posts: 4,558
Likes: 2
Subford thanks for the info. There have been a couple threads on here where we talked about this & thought it was to keep the TB warm in the winter . Glad you cleared that up , i allways thought cool intake air was better .... Lew
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Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
Cool air is better going in but not in the intake manifold.
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Mountain Pass
Joined: Sep 2009
Posts: 151
Likes: 0
From: Roseville, MI.
Good info, I myself had been wondering the exact function of this hose. I did have a question about it though,,, the hose on mine has a section across the radiator that is metal and is very rusty, so, if I needed to replace it, would it be better to track down a new one or can it be replaced with a length of rubber hose?
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