Hey I had firestone do a inspection on my car. They said it was great shape no issues. Picked it up and it was steaming. We were in a hurry bf said prob from them cleaning off motor. Next day I drive it bout 100 miles radiator leaking. I get it home changed radiator. Now my oil is bubbly on the dip stick. Would this be a head gasket issue? If so anyone got a motor for sale?