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Further 1993 Civic A/C Question

wpaxt on Fri April 22, 2011 2:03 AM User is offline

Year: 1993
Make: Honda
Model: Civic
Engine Size: 1.5
Refrigerant Type: r134a
Country of Origin: Japan

This is a follow-up to my previous question about my 1993 Civic A/C. My compressor had a leak so I replaced it with a used compressor from a 1995 Civic. My mechanic put it it, it works fine but doesn't seem as cold when on max cold as my previous (leaking) compressor did. My mechanic took the car back, did a dye test & used a leak detector and couldn't find any leaks. The compressor is fully recharged & is working fine. Any thoughts as to what might be going on here? I would think it might be something like the expansion valve or maybe a sensor except for the fact that when the old leaking compressor was recharged it was ICE COLD for a few days before the leak slowly won out & the freon leaked out.

Thanks again for any help/advice that you can offer.

Bill in Los Angeles

HECAT on Fri April 22, 2011 10:17 AM User is offline

It is better to post your followup questions in the same original post.

Anyway, you would need to post more test data (pressures temperatures, etc.) to get more responses and recommendations regarding it not cooling.

My first thoughts go to the potential of oil logged heat exchangers, which can reduce proper thermal transfer. How much oil was left in the system? How much oil was in the used compressor? How much oil did your tech add? How much oil total is in there now?

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mk378 on Fri April 22, 2011 11:47 AM User is offline

It could be:
Too much oil
"New" used compressor is worn and not working well
Other system problems (for example, reheating from the heater not cutting off fully is real common on the Civic)

NickD on Sat April 23, 2011 7:18 AM User is offline

Not sure about Japan, but in 1993 in the USA, Honda was still using R-12. If the same is true in Japan, but converting to R-134a, you are lucky to get any cooling at all. These were very marginal systems even with R-12, but were far improved with the later R-134a systems with a much larger parallel flow condenser. Honda was the first to produce an R-134a system with a clear sight glass. So how many bubbles do you have in your sight glass?

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