Ok, as I said in an earlier post, my car keeps getting too warm, about 235 or more, and I just happened to remember this when I was watching my engine get put back together.

On the bottome of the TB, there is a short hose, that makes a " U " shape that turns back down to go to the manifold, (I think)

When I got the car, there was no hose there and the car ran perfectly fine, no leaks, nothing, and the mechanic put a hose back in it's place, even though the car was run for at least a good year or longer without it.

My question is, should I take that hose back off? Or leave it on there? , when I asked the mechanic why the hose might have been removed, he said that it helped the fuel run cooler top end, thus helping performance.

Would this hose being put back on the car have ANYTHING to do with my car running warm?

 

That U shaped hose carry's coolant from the intake manifold up into the throttlebody (goes in right by the IAC passages on the bottom), then out on the other side of the throttlebody (under the PCV connection pass side) and goes to the diverter valve (black box thing sitting above the pass side exhaust manifold with all the coolant hoses).

When the U shaped hose was removed the previous owner has probably done a throttlebody coolant bypass mod, its a common free mod that people do to these cars (article is in the tech section). The reasoning is that the coolant fluid is hot while the car is opperating, and running this hot fluid through the throttlebody heats the entire throttlebody and intake plennum up, which results in hotter air entering the engine. People will do the bypass mod which means the coolant no longer flows through the throttlebody, keeps everything cooler including the air going into the engine.

Did the car start running hotter after this mechanic changed out the hoses? Throttlebody coolant bypass or not it shouldn't make a difference. But if the hoses were all redone its possible there were mistakes made with the diameter of hoses used or the routing of the hoses. Definately do not remove the U shaped hose and attempt to drive the car.

 

Yes, the car did start running hotter after the hoses were put back on.

I understand that a newly rebuilt motor will run hot for a while till it loosens up, but the motor now has 138 miles on it and it still runs 235+ EVERYTIME I drive it for a while.

The thing is, when I got the car nearly eight months ago, that "U' shaped hose wasnt even on the TB, and the car ran cool until after the motor was rebuilt.

I would like to have that hose removed and keep it that way.

Something else Ive noticed before and after, before the motor was rebuilt, the plenum and runners would be cool to the touch about half an hour to an hour after the car was turned off, NOW, the plenum and runners stay burning hot a good 2-3 hours after the car is shut off.

I want things back the way they were.

 

Hello??????

 

Like I said, having the hose there or having it bypassed will not affect the temperature of the coolant. The only thing that will affect is the temperature of the throttlebody itself which is a different thing entirely. So removing it will make the throttlebody and intake run cooler, but it will not solve any problems having to do with the car running at 235 every time. If you want to put it back how it was anyway, there is a tech article on how to do it, and multiple posts that cover how to do it. Either read the tech article or do a search and research a bit. Its a very easy and cheap mod to do, less than $20 and should be able to do the mod in under 30 minutes if you got the right parts.

 

Im just saying that the mechanic did absolutely nothing to the TB except put the hose back on there. It ran fine Before he put it back on there.

 

if you have electric fans make sure they are coming on. my fans were worn out and ran kinda slow so i replaced them out of my buddies wrecked iroc. yea i got a lot of stuff out of it though. his interior also lives on in my car