hi guys recentley brought a audi 80 tdi last month of ebay milage is 225k been a great car doing 400 miles a week in it to work. noticed a few issues with cooling.

top rad hose is hot and hard. bottom hose is hard and lukewarn cars sits at 90-95 degrees blows hot air. today though it went up to 100 degress cold air through vents had to pull over wait and relive pressure in header tank after this was great again

car has had water pump/new header tank and cap/water pipes /thermostat

could the issue be a blocked radiator other than this drives ok took cap of header tank earlier drove a mile to let air escape then replaced cap both pipes to radiator same now hot

any help or advice would be welcome or recommend somebody to look at it in birmingham cheers