To answer original poster, no, pluots cannot pollinate other pluots, as pollination is something done by insects and wind.
If you meant cross-pollination, then yes, pluots can do this to each other, and with four I don't think there will be an issue of incompatible pollen.
@Samu
Spicezee is not a pluot, it is a nectaplum (hybrid) which has 87% peach/nectarine in its pedigree and only 13% plum.