Cadillac Repair: need help troubleshooting coolant system, coolant system, head gaskets

Question
95 cadillic deville continues to overheat, I replaced the radiator and hoses. Thinking it might be water pump, but have heard it's not an easy job to tackle. I am usually mechanically inclined and was looking for some helpful advise and if it will be worth my time and effort. Also, if you think I should try something else before attempting this job. Thankyou for any advise you can offer, Chuck

Answer
The most likely fault is small leaks in the head gaskets. Remove ALL the spark plugs and pressurize each cylinder with 60 lbs of compressed air into each cylinder and see if you see bubbles in the radiator with the radiator cap removed. If you DO, You have faulty head gaskets. which is very very common.