In december i noticed my van had been leaking a small amount of coolant when i had it stopped for a short period of time. i did a visual check and noticed it was leaking around a coolant pipe that entered the left side ( when your standing facing the engine) of the lower intake manifold. there is a small yet important o ring gasket that slides over their pipe and seals it off. like most other things this o-ring gets old and brittle and fails, it's a fairly simple fix if you have any mechanical background but if not it will prob cost your close to 500.00 to get it done. and why your at it these vans have had problems with the lower intake gaskets so while your in there you might as well replace the uppers and lowers.