hi all, i got oil, oil filter, and spark plugs to do a service on my car i pull the old spark plugs out and there the cheap 11 guage ones and i had the 8 guage ones that were specified. i tightend 2 of them up as per normal and when i had to put the old ones back in i noticed the spark plug gasket hadnt even been squashed.... i ran the motor for about 20seconds after putting them in.... would this have done any damage to my motor?? the idiots at norris motor group put on the paperwork that my car was a 06 liberty 2.0r but in actual fact its a 2.5 liberty with safety pack i noticed this when seeing ej25 on the motor.

any help would be greatly appreciated