You had a coolant leak issue before no? Only advice I would offer is if your van has the monstrous fan shroud mine has, I'd remove it so you can actually see something. When I was doing ongoing work, I kept mine removed for months so I could monitor a leak repair on my PS pump. You''ll probably need to tie off the air filter assembly to keep it form hitting the fan. Point is, you need to put eyes on where the actual leak is coming from and removing the shroud will greatly improve visibility. JMO.