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altima hi side is up down '' '' '' etc..

pckash on Sat July 30, 2011 12:11 AM User is offlineView users profile

Year: 06
Make: nissan
Model: altima
Engine Size: v6
Refrigerant Type: 134
Ambient Temp: 100
Pressure Low: 35
Pressure High: 350+
Country of Origin: United States

having a little trouble with this one. car was brought to me after they had installed a reman. compressor. blew cold for a day then nada. when i put the gauges on engine idling 100 degree day low side was 10 high side nothing so i evacuated found a leaky oring on compressor replaced it then charged with nitrogen and waited two hours no leaks. added 2 ounces of pag 100 and charged freon by weight .at first i had 35 low 275 high with 42 vent temps. shut it off restarted and it started shooting up to 450 high side low would drop to 25 before it would disengage i am assuming the hi pressure switch was cutting it off would restart when hi hit 200 and just keeps slamming up and down?? txv restricted???? any help would be appreciated. thanks

mk378 on Sat July 30, 2011 11:30 AM User is offline

Condenser fans working? Why did you add more oil?
If the original compressor suffered internal mechanical failure the condenser is probably clogged up with debris.

JJM on Sat July 30, 2011 2:15 PM User is offline

Where was the reman compressor sourced from?

As MK mentioned, if the original compressor suffered internal mechanical damage, condenser is done, as is pretty much everything forward of the firewall.

Was the system flushed? Vacuum pulled?


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pckash on Sun July 31, 2011 2:00 AM User is offlineView users profile

thanx for the advice, after swapping out condenser and flushing lines, and evap, expansion valve was pretty trashed but it was type that could be disassembled so flushed cleaned and long story short, low side showing 40 ,hi running 225 and my vent temps back around 42. and to answer your question regarding why added oil, got roughly an ounce ran out of compressor and line set when unhooked to change o-ring's and there was oiltraildown compressor trailing back over the engine so with no way to measure exactly was left in system i chose to add a bit . which was pointless since i had to tear it all back down and start over, which is what i should of done to begin with. live and learn,again thanks for the advice,i have learned more from this forum in a few months than i ever did in all those years in school.

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