05-28-2019, 05:28 PM | #1 |
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Join Date: May 2013
Location: Mississippi
Posts: 501
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AC Condensor Question
When I did my LS swap, I installed a new compressor, receiver dryer, orfice tube, and accumulator. For the past 3 years when my AC is on it will blow cool, then warm a little, then cool etc...
I converted it to R134 already, should I replace the condenser with a parallel flow condenser? I have heard to do that once it is converted to R134.
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1987 R20 Suburban LQ4/4L80e swap: http://67-72chevytrucks.com/vboard/s...d.php?t=693824 |
05-28-2019, 07:43 PM | #2 |
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Join Date: Oct 2008
Location: Wentworth, NH
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Re: AC Condensor Question
What're your pressures running at what vent and ambient temps?
Did you flush out all the old oil? The old mineral oil left in the system can slosh around and inhibit thermal transfer.
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1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
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05-29-2019, 12:04 AM | #3 |
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Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,611
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Re: AC Condensor Question
It is normal for the compressor to cycle on and off. Keeps the cold side from freezing up.
Also possible that you have either too much or too little refrigerant. 134 is less tolerant of improper refrigerant amounts compared to R12. Some systems have a thermostatically controlled on/off anti-freeze switch in addition to the too low and too high pressure switches. If you have one of these, sometimes you can adjust it cooler while still not freezing up the system. |
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