I am having something similar. I had a small leak around the thermostat housing so I replaced the thermostat and gasket and upper radiator hose (it was swelled in areas) i had heater for over an hour or so when I first got it done. parked it it has been 2 weeks, I let it warm up and all I get is some lukewarm heat. It has been flushed out I have no clue whats going on now.


91 Montero LS "Sandstorm", Auto, Dual Bouncy Seats, 2" Suspension lift, 2" Body Lift, GENII front IFS, 32" MT tires

89 Raider "Trailbreaker", 3.0, Auto, Dual Bouncy Seats