By Passing Water hoses going through Throttle Body

jpchefz · Oct 30, 2010

I have an 88 GT, it is basically stock. There is a water hose running through the throttle body. The hose connects in the front of the TB and exits the back of the TB. Not sure why water runs through there? anyway, can I just run a straight hose elimiating the water going through the TB? Does it need the water running through it? If I can bypass this, is it cool to just put some vacuum covers over the ends where the hoses attach to the TB?

Thanks!

Mustang5L5 · Oct 30, 2010

Its there to cool off the egr spacer which gets hot from passing hot exhaust gases through it.

Leave it alone...its there for a reason

robo · Oct 30, 2010

do not remove the hose. like already posted it is meant to cool the heat generated by the egr.

they call it coolant for a reason. back in the day you would see guys doing that and i'd always ask them why they stopped there? if you can run an engine cooler by cutting off the flow of coolant why not eliminate it from the engine, altogether?

MFE92 · Oct 30, 2010

I say move 'em if you want to, because nobody in all my years following these things has ever provided an explanation for why the EGR "cooling" function didn't exist on 5.0 Cobra intakes, which mount their EGR's in exactly the same place.

wythors · Oct 30, 2010

You can plug off the port at the back of the intake with a pipe plug and you can cap off the port on the heater tube with a piece of hose with a bolt stuck in it. I hate to agree with MFE92, but I do in this case. The Cobra manifold doesn't have this provision and I didn't replace the hoses when I got rid of mine. I've been running for a couple of years without them with no ill effects. There's nothing to gain by eliminating the cooling hoses, but nothing hurt by doing so either in my experience.

Vinnietbird · Oct 30, 2010

My Explorer intake didn't have that port in the back of the lower intake,so,I just deleted it altogether.It's been 5 years now and never had an issue with it. Sure,it was put there for a reason,but so was the air silencer for the air intake box,and a few other things we usually remove.In my experience,it hasn't hurt a thing,and,when I remove the upper intake,no water to deal with.

jrichker · Oct 30, 2010

Has anyone considered that the coolant lines might be there to actually heat the throttle body? Ice can form on the throttle body during times of low airflow, low air inlet temps and high humidity. Anytime you have a pressure drop across an orifice, the temperature of the gas flowing past the orifice drops. That principle is what makes the air conditioning in the car work. You might not think of a throttle butterfly as being an orifice, but that is exactly what it is.

Carb cars have problems with icing of the throttle butterfly. In piston engine airplanes there is a setup to direct hot air to the carb inlet to prevent icing in flight.

wythors · Oct 30, 2010

jrichker said:
Has anyone considered that the coolant lines might be there to actually heat the throttle body? Ice can form on the throttle body during times of low airflow, low air inlet temps and high humidity. Anytime you have a pressure drop across an orifice, the temperature of the gas flowing past the orifice drops. That principle is what makes the air conditioning in the car work. You might not think of a throttle butterfly as being an orifice, but that is exactly what it is.

Carb cars have problems with icing of the throttle butterfly. In piston engine airplanes there is a setup to direct hot air to the carb inlet to prevent icing in flight.

Yes, I am well aware that it is there to warm the throttle body. As none of my cars leave the garage during the winter, it is not a consideration for me. That and the fact that the Cobra doesn't have it, so it can't be a very major consideration.

jrichker · Oct 30, 2010

wythors said:
Yes, I am well aware that it is there to warm the throttle body. As none of my cars leave the garage during the winter, it is not a consideration for me. That and the fact that the Cobra doesn't have it, so it can't be a very major consideration.

It must be nice to be one of your cars and never have to go out in the cold...

The rest of us are not so blessed, so we get to put up with the trauma of driving in the winter. I am glad there was some though given by Ford engineers to prevent this problem. It kills a few airplane drivers each year because they don't think about it until the engine quits running and won't restart. Gee, the ground is coming up awfully fast...

jpchefz · Oct 31, 2010

Thanks for info. I am going to leave it alone!

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