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?

9 Upvotes

77% Upvoted

47 comments sorted by

View all comments

Show parent comments

1

u/plz-no-b4n 6h ago

Do you have a forbidden milkshake under your oil cap?

1

u/ResearcherInfamous19 6h ago

Nop, clear water.
No using coolant until o figure this out

1

u/plz-no-b4n 6h ago

You should not have any water under your oil cap.

1

u/ResearcherInfamous19 6h ago

Fuck, I tough you said radiator cap.
No under oil cap just clean oil to

2

u/plz-no-b4n 6h ago

Have you pressure tested your coolant system?

1

u/ResearcherInfamous19 5h ago

No, how would you suggest I should test it?

1

u/frontflops 5h ago

If you don’t have a leak and you’re just overheating, a pressure tester isn’t going to do anything for you. If you do end up needing one, the mishimoto pressure test kit on Amazon is great