Overpressure!!

[zedxfarin]

It shouldn't be rock hard (unless it's hot and pressurized)

I know its very strange even when the engine is stone cold the hose is very solid full off coolant.

I will replace the hose and see from there, Is it the same hose? part no 16261?

 

[93celicaconv]

If you look at the diagram I'm pretty sure the hose you're looking for is in diagram 17-08.
Look at the end of the bypass pipes. It's explained there.

Here is the diagram 17-08 for the OP's vehicle VIN, if this helps.

 

[93celicaconv]

And this is diagram 87-16 for the Water Piping involving the Heater - if this helps.

 

[alltracman78]

If you look at the diagram I'm pretty sure the hose you're looking for is in diagram 17-08.
Look at the end of the bypass pipes. It's explained there.

Here is the diagram 17-08 for the OP's vehicle VIN, if this helps.

My bad. I forgot the T VSV line is on that same group. I figured the dashed line was going to the wrong outlet.

The heater core lines are what you want. I'm guessing it's the one on the right. 87245A. You might want to head to the the dealer to make sure?

 

[93celicaconv]

alltracman78, thanks for interjecting. I had my son's ST185 in the garage all winter/spring, but just got it back to him last week, otherwise, I would have looked at it in my garage. Sorry if I made an error interpreting the parts diagrams.

 

[Gert]

So assuming it is an heater hose: I remember I replaced the heater hose once with an regular fuel hose.

If I take a look at your picture I see the tube is rusted/corroded. That was mine too. So clean it as good as possible with an steel brush so the new hose can use the 'beard' on the tube. Use an good clamp and see what happens.
Dunno if blocking is a problem, suppose not. When you switch your heater to cold, the valve is closing the coolant system = blocking the flow anyway.

If coolant problems are gone now, all is good. If coolant is giving problems somewhere else, there is pressure on the system, mostly coming from an faulty headgasket.

 

[zedxfarin]

The heater hose in question runs from the water sensor tree to this control valve i just had a closer look!

There is a cable attached to the top leading to the firewall.

The hose keeps popping of at the Sensor Tree Side. I have already replaced the hose with Roose Silicone hose.

I have tried a few different clips T bolt & jubilee Super Torque Clamps in stainless steel. I torque it very tight with extension and the torque wrench, I can then not pull the hose off by hand.

Still after the car warms up eventually it pops off

 

[Gert]

Your tube and bead looks very rusted, did you gave it an really nice clean up?

 

[underscore]

Since this is a coolant hose, are you sure you're bleeding the system correctly each time you reinstall the hose?