My brotha has same problem,I think its just old fluids or you could take the cap off wait for car to heat up and see if fluid goes into the block. Most of the time you have to fill the radiator more than once to get the right amount of fluid in.Lol thought I had enough my car heated up real quick.I had to fill it up about 4 times.After replacing small hose that leaked all my coolant out from the im.Hope this help G/L