Air In Coolant System. Again !

[joemagee]

My car started over heating and had no hot air. I took it to toyota and they bled the system said there was an air lock in the heater matrix. I have ran the car for a week but today the heating stopped again and when I raised the reservoir bottle and took the bleed cap off there were a few bubbles why would they be back if toyota bled it and why run perfect for a week ? Its had new water pump new thermostat and the radiator is fine plus there is no leaks etc.

Would people just think some air left in the system ?

Thanks Joe

[barmyscotty]

hi all i can think of is maybe something not sealed correctly or a gasket is leaking a tiny amount so after a period of time is building up into an air lock or bubble. maybe it good be around the new water pump. not to sure to be honest