Adomas123

Does anyone know any causes why the cooling fluid starts leaking through the drainage (on the right side underneath car), especially it starts running pretty fast when the car is heated. Any tips what or where i should look for solutions or what to look at .

John535is

I assume you mean it's leaking out the overflow pipe from the coolant reservoir. Do you find it does this when you stop the engine, but not while it's running?

If so, its probably the seal in the blue cap. The caps are pretty cheap, you can get a seal but a new cap is usually not much more than the seal (and its nice a blue!) I would start with that.

These cooling systems are pressurised, so a leak lets the coolant temperature to rise. (Kinda like the difference between a pressure cooker and a boiling kettle). So if its coming out the everflow, its loosing pressure somewhere, and the plastic cap and the plastic reservoir are the usual culprits.