The blow-by test

I really want a four wheel drive version of this vehicle so I'm going to sell this one. I really wanted to just buy the 4x4 and sell this one later but they are rare so I'm going put this one up for sale and improve it until it sells, updating the advert as I go.

So to prepare for that I did some research and found out one of the tests of diesel engine wear is a blow by test.  So I decided to record the test.
I didn't have it plugged in and it's 21' F here in Minnesota and it starts up with no hesitation.  It's so nice to have that assurance for when you're in the woods far from a cell signal.
The blow by test I watched on YouTube involved turning the oil filler cap upside down and watching to see if it was pushed off.  Since this is a van configuration instead of a truck the filler neck is at an angle.  So the alternative, and IMHO more stringent test is to use a ping pong ball.  Since there's just enough lip to keep the ball in place when the engine isn't running it should take very little blow by to move it enough for it to fall.  Happily the ball barely moved and I'm curious to know if the vibration of the engine isn't causing its movement, but since you can't do the test without the engine running...