I decided to get prepared for our upcoming long PA winter by doing some PM work to my '91 FJ80.
Last winter I remember the heat was far from adequate, so I decided to dig into getting more heat out of her.
I replaced the thermostat with OEM (including the top gasket) - no change in heat.
I flushed both the front and rear cores with water and compressed air. I flushed them independently, nothing unusual came out of the line. (I assume the top firewall ports are for the front heater core)
My flow control valve operates correctly.
When the truck is warmed up, and the temp gauge sits at half (where it normally does for my truck) I get 95degree vent temperatures when measured with my IR thermometer, that's with an ambient temperature of 60degrees. I read in other threads that people were getting 135degree vent temperatures. I don't lose any antifreeze to speak of.
I have not tried the CLR method yet.
I don't think my heater core is clogged in the heater box because I get good airflow. (meaning there's probably not a squirrel nest in my heater box)
I haven't checked the outlet temperature of the rear heater.
Is this vent temperature normal? Any ideas what I should try next?
Last winter I remember the heat was far from adequate, so I decided to dig into getting more heat out of her.
I replaced the thermostat with OEM (including the top gasket) - no change in heat.
I flushed both the front and rear cores with water and compressed air. I flushed them independently, nothing unusual came out of the line. (I assume the top firewall ports are for the front heater core)
My flow control valve operates correctly.
When the truck is warmed up, and the temp gauge sits at half (where it normally does for my truck) I get 95degree vent temperatures when measured with my IR thermometer, that's with an ambient temperature of 60degrees. I read in other threads that people were getting 135degree vent temperatures. I don't lose any antifreeze to speak of.
I have not tried the CLR method yet.
I don't think my heater core is clogged in the heater box because I get good airflow. (meaning there's probably not a squirrel nest in my heater box)
I haven't checked the outlet temperature of the rear heater.
Is this vent temperature normal? Any ideas what I should try next?