The coolant in the overflow tank bubbles alot. Is this ok or is there a problem? It doesn't overheat it get's to about 220 then it goes down. I replaced the thermostat. I also flushed the radiator so I don't think it's plugged. Could my water pump be bad?

 

are you loseing any coolent??

 

No, It's just bubbling in the overflow tank.

 

get a new radiator cap for it.

 

So then it's not my water pump? Man I hope not that's a pain in the butt to do. The rubber in the cap does look cracked and it's pretty old. Well I'll try that and I'll let you know. Thanks.

 

well I tried the radiator cap but that didn't work It still bubbled so I replaced the water pump and it stopped so I guess it was the water pump. Thanks for the help.