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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Air Conditioning

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Old Jul 28, 2016 | 05:35 PM
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Air Conditioning

Happy Thursday everyone. On my 83 f150 5.8 truck, the air conditioning has stopped blowing cold air. After inspecting, it looks like I have a larger port (with a blue cap) on the left side of the engine and a smaller cap that looks like it was installed on the truck when made. The question I have is has the ac been converted to r134 knowing this information?
 
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Old Jul 28, 2016 | 08:23 PM
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blue cap indicates it has atleast had a R134a fitting installed. Now the question is was the old R12 removed or did they just simply add R134a to the system that still had R12 in it.
 
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Old Jul 28, 2016 | 11:37 PM
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The best is since it sounds like it needs a charge in my opinion is to. drain out the oil from the compressor buy a new filter/drier add a pag oil evacuate system & charge with 134A.
But first make sure the compressor is good. Ford compressors fail & are prone to Black Death. If your oil or freon is black then you have a much bigger job in front of you.
 
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Old Jul 29, 2016 | 06:01 AM
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Originally Posted by kermmydog
The best is since it sounds like it needs a charge in my opinion is to. drain out the oil from the compressor buy a new filter/drier add a pag oil evacuate system & charge with 134A.
But first make sure the compressor is good. Ford compressors fail & are prone to Black Death. If your oil or freon is black then you have a much bigger job in front of you.
He can assume it has had the ester oil already added correct?
 
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Old Jul 29, 2016 | 12:03 PM
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really depends on the compressor if he has a dealer A/C unit after 1982 installed or a pre '82 factory ac system using the York Techumsa compressor then the oil is the least of the worries as the York style of compressor has a sump to lube the compressor so oil swap is not necessary as the oil does not flow with the refrigerant like it would on a sumpless design. The old A6 GM compressors had a sump as well on the York style and the A6 style I never changed over to Pag oil never even changed the oil to be honest and the A/C has been working for years and years without failiure.
 
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