VS V6 Coolant issue

[sk2304]

Hi there,
Had an issue since I have had the car it will push coolant out of the radiator cap. A change in brand for the cap has stopped most of it.
I find that the overflow bottle gets full and coolant comes out of the overflow hose from that.
The system has been bled numerous times but the issue keeps happening.
Can I assume there is a blockage in the radiator? I can tell the radiator has been replaced prior to me owning it.
Cheers

 

[BowTie]

Sounds like head gaskets. Compression test.

 

[losh1971]

Might be a manifold gasket issue. At some stage nearly every Eco and Buick V6 will need the mani gaskets replaced. Manifold problems are far more common than head gasket issues.