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1977 Chevrolet Custom Deluxe AC problem

Tiny
JAMES 23
  • MEMBER
  • 1977 CHEVROLET CUSTOM DELUXE
1977 chevy c 10 305 engine. Brand new compressor on it evacuated the system and put a vaccum on it for about 45 mins. By the way I oiled the compressor before puttin it on. Recharged the system with 134a and did use retrofittings. No leaks but still blows hot air out of vents
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Wednesday, July 22nd, 2015 AT 6:56 AM

4 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
How much did you put in? It should only take about t80% of what the R12 charge is supposed to be. What are your pressures? Is the water valve shut? Is the large AC line cold or frosty/sweating?
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Wednesday, July 22nd, 2015 AT 3:10 PM
Tiny
JAMES 23
  • MEMBER
  • 3 POSTS
Put 3 12 oz cans the pressure when checked on low side was pretty high and no the large line was not sweating. The accumalator did for a brief moment and even got cold but quickly dissipated
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Wednesday, July 22nd, 2015 AT 7:26 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
What are the pressures and what was installed was it R12 or a similar product? It should be 30 psi or around there at about 1500 rpm.
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Thursday, July 23rd, 2015 AT 5:49 AM
Tiny
JAMES 23
  • MEMBER
  • 3 POSTS
I installed 134a in the system and I will check the pressure today on my lunch break.
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Thursday, July 23rd, 2015 AT 6:34 AM

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