I have done it in the car, make sure it's warm and you will have better luck getting it out in one piece. I used a long set of curved needle nose pliers that have a half inch diameter circular jaw nose. I don't know what they are called? Picked them up at a swap meet thought they would come in handy and they worked great for PCV install and grommet removal. I warmed the new grommet up in hot water and put some wd40 on it, it went in easier than expected. I think I just used a long punch and screwdriver to put it in.