My honda civic lx is overheating its bubbling in the over flo n no hoses are colapsed they have no pressure n them... I have replaced the head gasket ,but car still overheats after a few minutes of driving then starts to studder,I know that's due to the aluminum block swelling cause of heat... and no there isn't any colant in oil...

See if the link below helps:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-46563-3.html#post235973

A Honda-trained mechanic told me most Hondas overheat due to:
. Thermostat being installed incorrectly, or
. Thermostatically-controlled radiator fan failure.