My car is having a coolant problem.It all starts when the car overheats and all the coolant goes through the cap.That happens when the car is parked and the engine is swicth off. So we just refill it with water and call it a day. But the problem now is the car always loss a lot of coolant.
I refill it with water up to the top level and leave it for a night. The next day I start, the OBC says “LOW COOLANT”. So I check the coolant level, it’s almost empty. Where did the coolant go?
When I refill, I don’t see any water dripping below the car and I even and use it for the day. I come back and check the level, its ok. But the next day, the level would be low again. Why is that? The car has 43k Miles and it regularly service.
I actually did some googling. i found this pelican article regarding E36 coolant. Pelican Technical Article: BMW 3-Series E36 Cooling System Flush
It says the main area I should check is: To Do list:
3) The reservior
5)Seal on radiator cap
6)Perform pressure test from Pro
7)Check head gasket (Also sugested by thedude60126) to check if coolant leak into the oil if does not hold pressure)
Faulty head gasket if you remove the oil cap and find some yellow murky subtance)
Today, I check the car again, There's no coolant or water in it.
But i notice a few things(shown in pics)
1) I notice there's coolant on the screw?
3) Coolant on the floor
What does this indicate? Faulty cap?
thanks for the reply. I need some opnions.