W126 '83 380 SEL - No heat, dry mono valve.

[bolomiester]

I've been following threads in the archive regarding NO HEAT. I changed the thermostat (Berh + MB antifreeze + new hoses + new radiator), and installed a new mono valve kit but I still have no heat. Air conditioning has always been ice cold.

The weird thing is, when I changed the mono valve it was totally dry inside. So dry there was a small cob web in it.

Can anyone suggest the next place I should look? Plugged heater core? Plugged auxillary water pump. Something else stopping the coolant flow before it reaches the mono valve?

The good news is, the engine now reaches normal operating temp, runs stronger and shifts smoother, but it's gettin' cold out there!

Small Note: The car was very neglected before I bought it.