My heater core is leaking coolant on my 1998 Intrigue 40'. Does anybody know how to access the metal box that houses the core? The way the box is located up high and in between the front bumper and the cross member that supports the condenser fan, is too tight for me to get up into to reach the screws. Does anybody know a way to reach them other than using a small child? Is there something I'm not seeing? Please advise.
Did mine last summer - it’s a PITA.
Loosened the AC condenser & fan and rotated them out of the way.
Disconnect the fan resistor wires from the upper box under the dash - also disconnected all the air tubes. Removed the screws holding the upper plenum from that lower box.
From below, there are many hex head screws holding that box to the floor - a magnetic socket, several long extensions, Milwaukee mini impact and a lot of cuss words later got them all out - the ones in the front and LH side are hardest to find. Be careful - that box is heavy and will fall on you.
Bought an aftermarket heater core - fits fairly well - had to do some trimming to get the core back in the box. Not all the all the screws were used during re-installation.