If there is air, it in is the line, not the radiator. You would have to flush the system to make sure the lines are clear. I am not sure why you think there is air in the system. If you had the replacement performed at a shop, take it back to them and have them check it. Unless the car is overheating, I doubt if there is a problem with the water pump. If there were, you would not get coolant to the engine and overheating would occur.
〉 Answered on Mar 13th, 2015 by Gail Dunn, Owner at Women's Automotive Connection
You'd have to bleed the system. To check the water pump, the system needs a pressure check.
〉 Answered on Mar 13th, 2015 by Gelina Aquilina, Service Advisor / Mechanic at
Mary, On your 1999 VW Beetle. After a radiator is replaced there is a bleed procedure to remove any air. I would suggest having it bleed correctly first, before checking other components. Good luck.
〉 Answered on Mar 13th, 2015 by Maryann Croce, Owner at Croce’s Transmission Specialists