My ecoboost Fiesta has a plastic coolant tank that is pressurized to 21 psi(!) Is this common? Why does it need to be pressurized? I assume there is still a radiator cap for over pressure protection? I realize it raises the boiling point but many cars get by with an open system.
The problem is it has three lines in and out. The middle one has a small, continual leak because there is no way it’s going to hold pressure over the long term given the engine vibration and cheap design of the fitting. I used JB Weld today to hopefully seal it once and for all.
Seems like a prescription for failure given the coolant is critical for cooling the turbo bearings. Ironically the hose to the engine has a conventional clamp. The pipe to the turbo has a clamp on a fitting that on the other side has silly rubber o-rings that Leak.
The problem is it has three lines in and out. The middle one has a small, continual leak because there is no way it’s going to hold pressure over the long term given the engine vibration and cheap design of the fitting. I used JB Weld today to hopefully seal it once and for all.
Seems like a prescription for failure given the coolant is critical for cooling the turbo bearings. Ironically the hose to the engine has a conventional clamp. The pipe to the turbo has a clamp on a fitting that on the other side has silly rubber o-rings that Leak.