Borrow a pressure testor from one of the stores like AutoZone.
It is a fact that the pressure builds after a hot engine is shut off and will like a few minutes later. It is difficult to look around for leaks on a hot engine. The pressure tester will let you do so repeatedly when the engine is could.
1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T