My van leakes antifreeze by intek, i do not know what this could be? on 1997 Nissan Quest

Antifreeze leaks by intek and falls to the exhaust
if the heater is on nothing happens

Asked by for the 1997 Nissan Quest
Probably one of the hoses on the underside of the intake plenum. When removing the plenum it is very helpful to romove the bolt that holds the metal fuel lines to the plenum (located near the EGR solenoid valve) that is just under the rubber intake ducting. Also a pair of long reach needle nose pliers will greatly assist in removal of the clamps on the hoses to the intake manifold. The plenum is a pain but it does come off. Replace ALL of the short sections of water hose on teh underside of the plenum. If you are still having difficulty email me for pics. Note that the coolant that leaked probably soaked into the exhaust manifold insulation so it will smoke like crazy when you start up again.
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Look closer at the heater hoses, sounds like it maybe a leak in the hot water valve going to the heater. when it's closed the coolent leaks and when open it's flowing enough to stop.