Coolant in heater/AC question
So I tore down my ventilation system today and there was probably 16 oz of coolant that came out of the vents, not the hoses. Is this a lot?
As far as I know the ventilation hasn't been changed or cleaned in 40 years. The heat/air hasn't worked since I bought the truck about a year ago. I did change the coolant and replace the thermostat shortly after I bought it.
Thoughts?
Also, how difficult is it to switch to R134a from R12?
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1973 C10 350 700R4
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