95 RCSB GMC, 5.7 TBI. Unmolested/ all OEM components under hood.
So after reading at least 19 pages relating to what I think is my problem, very good info on these pages, my problem is very weak heat coming from dash vent as well as the floor in any combo by the dash HVAC control knobs. No A/C on and dail turned all the way to the red.
1- Brand new radiator, new hoses, thermostat, flushed engine block throughly, reassembled with no leaks, none from heater core either.
2- using IR hand held temp. tool upper and lower rad hoses temps read as they should, can see by this method that thermostat is opening/closing. engine does not run hot according to gauge on dash, nor does it "smell" like its running hot. daily driver
3- Blower motor works great, produces good air flow through vents, dash/floor.
4- So from my understanding from my symptoms is 1- back flush heater core with gentle pressure, this is going to differently count as the stupid question, which way is which?! 2- after doing this my problem still exist, blending door? if so where is that located at? 3- If I remove blower motor and find that the space between the fins and cores are filled with crap, would this cause no heat transfer inside the heater core housing?! kinda stupid, but had to say it, I've learned anythings possible, if back flushing heater core doesn't solve problem, then new heater core, new HVAC control panel? Any info or insight on my problem would be greatly appreciated!
So after reading at least 19 pages relating to what I think is my problem, very good info on these pages, my problem is very weak heat coming from dash vent as well as the floor in any combo by the dash HVAC control knobs. No A/C on and dail turned all the way to the red.
1- Brand new radiator, new hoses, thermostat, flushed engine block throughly, reassembled with no leaks, none from heater core either.
2- using IR hand held temp. tool upper and lower rad hoses temps read as they should, can see by this method that thermostat is opening/closing. engine does not run hot according to gauge on dash, nor does it "smell" like its running hot. daily driver
3- Blower motor works great, produces good air flow through vents, dash/floor.
4- So from my understanding from my symptoms is 1- back flush heater core with gentle pressure, this is going to differently count as the stupid question, which way is which?! 2- after doing this my problem still exist, blending door? if so where is that located at? 3- If I remove blower motor and find that the space between the fins and cores are filled with crap, would this cause no heat transfer inside the heater core housing?! kinda stupid, but had to say it, I've learned anythings possible, if back flushing heater core doesn't solve problem, then new heater core, new HVAC control panel? Any info or insight on my problem would be greatly appreciated!