Please fill in your cars info: year, engine etc.; it may have a air pocket in the engine block. A vacuum coolant filling tool; is the quickest way to eliminate any air pockets in the system. I use the Uview airlift:
Welcome to the great and wonderful ORG! Many fantastic cars, people and answers lurk in this great land. If you haven't done so already, take time to fill in your profile and post a few photos so we can ORGle them!!