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Capping Off Throttle Body Coolant Lines.

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Old 02-29-2020, 08:08 PM
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Capping Off Throttle Body Coolant Lines.

So I live in FL, where this feature is completely unnecessary and while the intake is off the car for other reasons, I'd like to get rid of those lines, that way its not a pain in the *** to take the intake off every time if I so choose to. I'm talking about the lines that are by the EGR tube by the way. The current coolant hoses are corroded and falling apart anyway, so I'd have to get new hoses if I wanted to keep the stock config.

Anybody have a strategy on how to get this done?
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Old 02-29-2020, 09:25 PM
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Get a double sided 3/8 inch barbed brass connector, push the hoses on, and you're done! Simple!!
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Old 02-29-2020, 10:04 PM
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Go buy 8 or 10 inches of 3/8 tubing and loop the supply and return. Old tubes are going to fail if they're that bad.


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Old 02-29-2020, 10:09 PM
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You certainly could cap them as suggested.

On the other hand, you could just take care of all deferred maintaince items at one time.

There would be no need to remove the uim for another decade, if ever.
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Old 02-29-2020, 10:15 PM
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Originally Posted by User1
Go buy 8 or 10 inches of 3/8 tubing and loop the supply and return. Old tubes are going to fail if they're that bad.

The OP is talking about the two lines under the throttle body.

You are bypassing the attachment points to the uim. I did the same thing.
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Old 02-29-2020, 10:22 PM
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Originally Posted by JvG
The OP is talking about the two lines under the throttle body.

You are bypassing the attachment points to the uim. I did the same thing.
Not sure I know how to respond to that... Is that an argument?? lol

My post makes perfect sense. Not sure I understand your response.
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Old 03-01-2020, 01:28 AM
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User1, the title of this post refers to the coolant hoses which connect to the throttle body.

Your photo shows a hose which connects the coolant lines which normally connects to the back side of the uim.

So I'm saying that we are talking about two totally different things.
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Old 03-01-2020, 01:33 AM
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Originally Posted by JvG
Your photo shows a hose which connects the coolant lines which normally connects to the back side of the uim.
Da fawk are you smokin bro?

My pic shows a TB coolant bypass, exactly what OP needs. Granted it's a 2014 motor, but the principle remains the same.

And what the hell would the uim need coolant for?
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Old 03-01-2020, 01:34 AM
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I built and prepped the swap motor, I'm pretty sure I'm familiar with the hoses lol
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Old 03-01-2020, 01:50 AM
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the big black water hose on your engine is in the same place as similar hoses on the back of the 1996 engine I have. There are two of them . They really do attach to a small pipe on the bottom of the uim. The pipe is just a pass through from one hose to the other one. I suppose it's there to raise the hoses so they don't contact the uim stuff. They are a pita to disconnect from the uim . Which is why I bypassed mine.
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Old 03-01-2020, 01:55 AM
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I'm going to exit stage left now... Cheers!
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Old 03-01-2020, 02:27 AM
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Originally Posted by JvG
So I'm saying that we are talking about two totally different things.
Study the diagram closely, then realize we are talking about exactly the same thing

https://www.nissanpartsdeal.com/part...14055%2c14056N
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Old 03-01-2020, 10:39 AM
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Originally Posted by JvG
the big black water hose on your engine is in the same place as similar hoses on the back of the 1996 engine I have. There are two of them . They really do attach to a small pipe on the bottom of the uim. The pipe is just a pass through from one hose to the other one. I suppose it's there to raise the hoses so they don't contact the uim stuff. They are a pita to disconnect from the uim . Which is why I bypassed mine.
I always bypass the UIM u-shaped hose. Without that u-hose and a simple mod to the brackets, I can pull the UIM without too much effort or skinned knuckles.
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Old 03-01-2020, 06:21 PM
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I went to Napa and got a longer preformed hose and installed that. Now you can lift the intake and easily remove clamps for hose.
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Old 03-01-2020, 07:37 PM
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This may help not to bypass.
Separate TB from intake collector/manifold (4 bolts)
Remove cruise control actuator brackets (2 bolts), unplug the air tube.
Remove IACV (3 bolts). Once IACV off, you have a big passage to EGR guide tube bolts and access to coolant hose clips. For the left/pass. side coolant tube, leave the end attached to the collector untouched, unclip the other end.


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Old 03-22-2020, 12:56 AM
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Doesn't the tb have a plunger that judges temperature via the coolant in the uim, and holds the butterfly open when cold and closes when warm? This is why rpm is higher during warmup.
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