Water leak issue

I have a 2010 Toyota Tacoma, it is currently in the shop and about to he finish with a fix of a hose that goes from the thermostat housing to the firewall, and I have been told it is a common issue due to the fact it sits under the exhaust manifold. Did you guys replace it with a metal or rubber hose after it broke?

 

Welcome To TW...you mean the AC drain Hose?

 

Curious what this hose serves?

4.0 or 2.7?

(it's helpful to include data on your vehicle when asking questions)

 

It drains the radiator really quick if not taken care of. It is connected to the thermostat housing.

 

I have the 2.7 liter engine.

 

I'm assuming you mean the coolant bypass pipe, it's a pretty common issue because the factory one is plastic.
It runs under the intake manifold not the exhaust manifold.
There are metal replacements available.

 

So the mechanic is correct with it being an issue.

 

Yes it is on the 05-15 2.7l but because it's plastic, it's not under the exhaust manifold.

Good writeup on changing it here.
https://www.tacomaworld.com/threads/2007-2-7l-coolant-bypass-pipe-replacement-info-photos.805019/