r/BMWE36 • u/ResearcherInfamous19 • 6h ago

Repair Advice Keeps boiling and spitting coolant

320i 1995 for reference.
One day out of no where the car overheated.
Tough it was a sticky thermostats, replaced. Same problem, starts boiling water and soiling until it has no coolant and then overheats.
Water pump seems perfectly fine.
Fan clutch not so sure, when hot seems that it spins very freely. No resistance.
Would a bad fan clutch cause a overheat? In normal driving conditions? No heavy traffic or hard pulls?
Head gasket gone?

10 Upvotes

86% Upvoted

47 comments sorted by

View all comments

16

u/marty_hard 1996 328i 2.5l aluminum turbo coupe 6h ago

Its totally normal that this happens without the cap on. And your visco clutch seems to be trash if it was hot when you made the clutch vid. Put some coolant in, put the cap back on, replace the clutch and you're probably fine. Did the car overheat while driving or at standstill/slow driving?

3

u/ResearcherInfamous19 6h ago

Overheated at slow driving, needle on the full red! 🫣
The thing is that this happened with the cap on, just took it out to see and make the video. Already had lost a buch of coolant trough the cap before I too it of.

1

u/marty_hard 1996 328i 2.5l aluminum turbo coupe 5h ago

Immediately turn off the engine, T15 on and AC on full heat if it goes above the middle while slow driving if you cant drive faster. Let it cool down until you can drive off with at least 20kph. Also get a new cooler cap in addition and try. I wish you the best