my adjuster inside the cab doesnt go all the way to the end of the adjustment hot side. the valve moves on the fire wall but not all the way. i assume its opening some but i still have no heat. flushing the coolant system didnt help so i am going to run some of the prestone radiator cleaning fluid (2 bottles) in the system and go on a road trip for a few hours to really work it in. we'll see....
is removing the dash necessary to replace the heater core in these trucks? i have an 81
