new member may have problems

[kbekl]

hi all i am new to the site and new to the Maverick,Terrano ownership

just purchased a 1995 maverick with 87000 on the clock seems to be in good condition

but have a few worries that have just popped up after a week of owning it

first big worry is one day i noticed some bubbling in the engine bay and noticed some water starting to drip on the road after a short journey, on inspection the header/overflow box was bubbling with the ignition off and their was pressure in the pipes from the radiator.

now when i start the engine the car runs fine and drives fine and does not overheat, the air does get warm from the heater, but their is a constant bubbling in the header tank and the level in their seems to rise.

have checked the oil cap and their seems to be no mayo, is this a major problem like the head gasket or is their a simpler thing that causes this, also the bubbling seems to be more at tick over as when the revs are increased they tend to calm down but continue to bubble.

the other thing is i am getting an unusual noise from the dashboard when accelerating from low down revs

sorry for the long first post but just need to see if i have bought a lemon