t4 coolant loss

[Steve06]

1900 t4 R reg was loosing coolant very intermitant seemed to be boiling out of the expantion tank, would go a few miles and loose a litre or go a hundred miles and loose nothing, seemed to loose more as it was warming up. Pressure tested system, gas test, then renewed thermostat and water pump. It is still loosing. Any ideas?

[macleod]

check the rubber hoses as i've had a similar fault which took ages to sort as months went by a hose split in the cold weather then it really lost a lot of water