Whats this hose?

D1cker1 · Post by **D1cker1** » Sun Jun 17, 2012 10:24 pm

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Yesterday a split formed about 2in long in this tubing.. It spewed Coolant as you can see in the picture

tcm glx · Post by **tcm glx** » Sun Jun 17, 2012 10:25 pm

D1cker1 wrote:

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Yesterday a split formed about 2in long in this tubing.. It spewed Coolant as you can see in the picture

Looks like the hose coming from the thermostat housing.

Agui-E7TE · Post by **Agui-E7TE** » Sun Jun 17, 2012 10:42 pm

I mentioned this in the other thread but that could be a leak from one of the coolant hoses that go to the throttle body. If so, that's an easy fix. The reason that hose is there is so the coolant can flow through the throttle body to help warm up the throttle body in cold climates. I know you can bypass that on TPI camaro/firebird engines from the late 80's.. I would think its worth keeping on the Bronco though.

D1cker1 · Post by **D1cker1** » Sun Jun 17, 2012 11:07 pm

Agui-E7TE wrote:I mentioned this in the other thread but that could be a leak from one of the coolant hoses that go to the throttle body. If so, that's an easy fix. The reason that hose is there is so the coolant can flow through the throttle body to help warm up the throttle body in cold climates. I know you can bypass that on TPI camaro/firebird engines from the late 80's.. I would think its worth keeping on the Bronco though.

TCM: More inspection coming

definately worth keeping

philofab · Post by **philofab** » Mon Jun 18, 2012 8:09 am

That hose is a bypass that runs from the thermostat housing to the water pump.

hobbyturnedobsession · Mon Jun 18, 2012 8:14 am

I had to bypass my bypass tube. No ill effects yet.

D1cker1 · Post by **D1cker1** » Mon Jun 18, 2012 9:24 am

philofab wrote:That hose is a bypass that runs from the thermostat housing to the water pump.

Anyone know a part # at oreillys or kragen?

Post by **SteveG** » Mon Jun 18, 2012 9:29 am

Pull it off, take it to a parts store and buy a replacement. Bulk hose should be fine. Piece of cake.

Agui-E7TE · Post by **Agui-E7TE** » Mon Jun 18, 2012 9:48 am

I thought he was talking about where his index finger is pointed. If it's the thick one below (not the radiator hose) that's the water pump bypass and its pretty easy to fix like Steve mentioned.

D1cker1 · Post by **D1cker1** » Mon Jun 18, 2012 11:10 am

Yes the hose where my index finger is pointed..
The hose is slightly larger than my thumb.

Thank you guys for your help

Agui-E7TE · Post by **Agui-E7TE** » Mon Jun 18, 2012 11:30 am

That's the coolant supply hose to the throttle body. It runs from the intake manifold to the bottom of the throttle body. That's a super easy fix.

Silverslk · Post by **Silverslk** » Mon Jun 18, 2012 12:05 pm

Part Number: A70646
Alternate Part Number: S-3009

Autozone

http://www.autozone.com/autozone/parts/ ... 883058_0_0_

Just buy the right one. With a 90 degree bend its better to have bent vs a possible kink.

Seattle FSB · Post by **Seattle FSB** » Tue Jun 19, 2012 11:09 am

Agui-E7TE wrote:That's the coolant supply hose to the throttle body. It runs from the intake manifold to the bottom of the throttle body. That's a super easy fix.

I believe you are correct! Below is the Water Pump Bypass Hose...

But I think he is actually pointing to the hose above it, between the ECT Tee and the Lower Throttle Body Cooling (actually Heating) Tube...

If it split at the end, simply cut it off an reattach it to the ECT Tee.

D1cker1 · Post by **D1cker1** » Tue Jun 19, 2012 1:23 pm

Replaced the hose.. It was not the water pump bypass it's the coolant supply to the throttle body
She's running again.. Used a whole jug of coolant
And almost half of the other.

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