estimate of repair 2001 pontaic montana code 0305 missing.Compression shows cold on 2001 Pontiac Montana

140/90 hot 140/60 told needs valve heads repaired or replaced, What cost am i looking at. Thanks

Asked by for the 2001 Pontiac Montana
have a leak down test done and a wet and dry compression test that will give you more info
1 more answer
possibly $1200-1800