Hi I am new to the forum, but have enjoyed reading them in the past.


The problem is that I have a small amount of air bubbles coming from the engine into the expansion bottle, eventually causing overflow, combined with a reasonable amount of steam exiting the exhaust.


There is no oil to water mix in coolant or engine, and there is no overheating.


I have recently replaced the water pump, cam belt, thermostat and radiator.


Head gasket or failed egr cooler?


Anyone have any thoughts


Thanks


Markeh