1st thing, im new, so hi,,

on my s2, the temp is fine, not running hot, but my header tank is swelling up. and so is the hoses to the thermostat and the 1 from the bottom of the header tank

ive flushed the rad, got a new preasure cap,

is this signs of a leaking head gasket,,

any info is most appricvated! as ive spent a fourtuna already,, lol