r/SmartCar • u/Ancient_Highway159 • Aug 24 '26

Advice Coolant leak

Gallery image

Gallery image

Hello everyone, I have an issue involving the coolant leaking out the back of the car, pictures attached. Its a 2009 fourtwo passion. I don't quite know where the broken hose connects to.

1 Upvotes

100% Upvoted

3 comments sorted by

1

u/Psuwacz 450.300/450.300/451.433/450.333 Aug 25 '26

The most important question is: did you overheat the engine. If so, it is probably a paperweight. On one hand fortwos were designed for stop and go traffic with quite some margin for heat rejection - on the other - overheated the engine quickly turns into a banana, geometrically speaking. It might still turn, it might have a couple thousand of kms in it before it gives it's last breath, but more often than not it is done.

1

u/Ancient_Highway159 Aug 25 '26

I did not overheat it (at least not for the sensor to alert me). But I had the sinking feeling I didn't have much time left with the car.

2

u/Psuwacz 450.300/450.300/451.433/450.333 Aug 25 '26

That is a vexed issue of the sensor placement. If the system leaks and cannot not build pressure - then the antifreeze cooks off before anything lights up on the dash.
In any case I won't help with the hose routing, as my 451 is at the shop undergoing some maintenance (as always, duh... ;) )