tyre leak

I went to change my old Tyre to news. But later when I pick up and went to servo for pressure checking. Because it look bad, if Tyre look alright. I wouldn't check the pressure. the 3 Tyre was nearly fk the rim. And one seem to be in good psi. Then put a hose in. Wow, don't know what happen...

Hi all, I got the Commodore V6 VR from my auntie for free as it needed a bit of work. I took it to the mechanic for the leaking power steering and the rack ends were replaced. However, didn't fix the problem. Have been neglecting the problems for a while, but recently decided to see what I can...