help needed posible head advice please

[wayneofhull]

hi could some one maybe help me i am no where near a mechanic 
i had a sevear coolant leak witch resulted in over heating i then replaced the rad and seem to still lose coolant and the expansion tank is getting a lot of pressure 
i have put some k seal in to expansion tank and tried to run it throw to try and fix issue but it spat it out of the expansion tank over flow pipe i am at a loss i als have the mayo looking substance but i cant seem to see contamination on the dip stick any advice would be muchly welcome its the 1.4 comfort  please help

[hutchysrs50]

Sounds like when its over heated it has warped the head slightly resulting in a failed head gasket.

[wayneofhull]

Sounds like when its over heated it has warped the head slightly resulting in a failed head gasket.

thanks for the reply i am soo confused theres no contamination in the dip stick but a small amount of "mayo" but dose not seem to be getting worse engine seems to run fine just seems after a while the pressure builds up in expansion tank and spits it all out the over flow could it be a blocked pipe or a water pump or even more a air lock its the 1.4 8v and its also only done 63k and up until 2014 it had a service every 3k miles from new then i did spark plugs and air filter and was planning a full service his week had an mot last week and emmisions seem fine  would that make any diffrance

[sepulchrave]

Please see your other thread for a simple explanation.