What sort of technique are you using to put the seal in? If you've chernobyled 4 of them i'm tipping you're doing it wrong.
Are you talking about the front seal behind the crank pulley bout 1"- 1 .5" big?
As long as you're sure you've got the right part, put some silicon on the outer edge, then lightly push it in. It may require some encouragement with a soft blow hammer but not so much force as to damage it.