I did this myself a number of years ago. One thing I found useful was to use the vacuum cleaner with the tool suction to draw any moisture from the gap around the pistons. Get each pioston to the top and give it a good suck. Bit more WD 40 and another suck.
If you got some water mixed in with the
oil in the sump, do not be surprised if you get a bit of steaming from the breather cap even after you have changed the
oil as you may still have some small residue. It will burn off, and after you change your
oil again preferably drained when hot it will go.
I certainly didnt suffer any problems as a result and as one of the previous posters said its only like blowing a gasket.
Best of luck with it mike.
Oh by the way dont let the wife see you sneaking the vacuum into the garage or you will be in trouble - ie no fun for a few weeks (timescale may change depending upon how friendly wife is and how many favour points you have built up).
Mike.
