Cadillac: 89 seville cooling system, rad cap, execpt

Question
I have a 89 seville which had overheated, before. Changed all rad houses rad cap, thermostat. flushed the system, now car runs perfect, doesnt overheat but there is bubbling in the overflow tank. The bubbling will start then go away and back again, it seems it starts to bubble at lower temperatures and goes away at high temps. The cars got me stump since it runs perfect execpt for its bubbling. Any help would be appreciated. Thank you for your time.

Answer
Did you put in the coolant sealant sealer in with the coolant ?.

If NOT, Get some from a local parts store. I believe they come in tablet form now but not sure. Just ask your counter person for coolant sealer for your Make-Year-model vehicle.


tom