Printable View
I taped it up with duct tape best I could without removing the hose but it came off during test drive.
Could something cause an abnormally high pressure in this hose? If I understand it correctly this hose sits after the intercooler connects to the throttle body.
The pressure would probably get to at least 20 psi judging by the TD5 engines and duct tape will not hold-up against that pressure unless multiple layers are applied. Race ("100 mph") tape tightly wound with lots of overlap on each pass has a chance at holding.
Silicone tape is the tape to use - have heard of it working well on charge air pipes (2-3 layers)
A quick Google search revealed that it is a common enough issue to split that pipe on the TD4. I would get it replaced as suggested with a metal one, then you can check whether or not there is excessive boost.