this little guy is the housing, or assembly, depending on who you talk to, (I now can identify all the parts in spanish, but still don{t have a clue in english). call it what you will, but this is on end of the big thing in the other pics, and this one end contains the faulty valve that is keeping the whole engine from working.

the part we have everyone looking for is the whole pump as seen in the other pics. but this is the part of it that really matters. so if you can find either - just this part or the whole pump - it would work.