Changed,fan,thermostat, heater core, was told timing belt was changed not sure about
water pump but told most shops change when apart,radiator good, but still running 3/4
hot 16 pound radiator cap, when running builds up good pressure but hear lot of bubbling
through system and heat not consistent,
Had the same problem and did all the things that you mentioned. First, see if your repair receipt is itemized to include the replacement of the timing belt as a warranty should accompany the repair if the belt does go out in the future. Have your head gasket checked. That is the only repair that I authorized to my 2006 above and beyond everything else you listed. Haven't had a problem with it since. Hope this is helpful but, if the problem now originates with the head gasket, be prepared to shell out enough bucks to make you question whether this car was such a good deal when you bought it. Replacing the thermostat, water pump, head gasket, radiator, and timing belt ran me about $2,600.00, all tolled. Hope this helps to explain yet another possibility and that it is the last major repair you experience with ownership.
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Kelly Little Ashford