Coolant loss out overflow

funfly · Unread post by **funfly** » 29 Jan 2008, 23:00

I have a 306 diesel with 100k.
When the radiator cap is on tight I loss coolant out the over flowpipe after only a few moments of running, also if the engine is cold and not running and a squeeze a coolant pipe coolant comes out the over flow pipe.
The system doen't seem to be over pressureised as the pipes arefar from hard.
I have tried bleeding the system a few times but no improvement.
The coolant system will almost empty it's self out the overflow pipe
I have been running the car with the radiator cap loose to help reduce the coolant loss.
There is no bubbles or oil in the coolant and the car starts first time everytime and runs normaly.

Could it be a problem with the expansion tank or cap?

Its starting to drive me nuts, hope someone can help?

XantiaMan · Unread post by **XantiaMan** » 30 Jan 2008, 07:57

Replace the cap, then try again. The system needs to be pressurized to work, if it doesnt it will boil over quite easily.

funfly · Unread post by **funfly** » 30 Jan 2008, 17:34

Thank you, will try that tomorrow and post the out come.
Now sorted, thank you again.