Thank ya Sir... Ya, Im acutally EPA Certified HVAC/Piper fitter(union). I was into Commercial Refrigeration,HVAC, Service and Repair for 15 years... But I got hurt, broke my Back on a Job, Thats why Im a Disabled Dude...But like most things, Cars are a bit different, and they scare the HELL outta of me...lol Was planning on pulling the Evap and Blower, but not till it stays warm for awhile...They replaced the Compressor, but it came outta 91 accord, mines a 92, So I dont kno what Refrigerant they used, or if the changed the Exp. Valve, Im assuming they upgraded some thing due to the fact that service ports are 134-A, And would a old r-12 comp work with 134-A, when did cars switch from R-12 ??? Or maybe they used that "Hot Shot" that suposed to work with anything ???...Who knoz, but I guess Ill find out soon...Its crazy what some ppl do, when they think they kno what they are doing ! Ima gonna degrease and clean all visible connections for starters, then wait till spring to really get in to it...I got No Garage... Thanks for the Info Tex ... Dave...oh, Is the Evap aluminum or steel, seem to have a mix of pipes 1 or the other, but they are all dirty as hell , so I dont know what I got just yet !!!

 

Found 3 leaks today... 1. there was no schrader valve in the High Side access port (quick connect)... 2. found tubing connections at Accumulator loose, 3.leaking at High side Pressure switch... Next stop, Evap, and TXV Valve(Expansion Valve)...But waiting on that till its warm again. Got some bad weather comin my way...Ima gonna have to pull one hell of a vacuum on this system, Im sure its full of all kinds of uncondensables...Got great air flow, but who knowz wut the dude I bought this car from had done......

 

If you are going to take apart the a/c, I would replace every o-ring in the system. I'd probably replace the Styrofoam inside the evaporator as well.

I am not sure if your accord had R12 or R134a, but I think that it is R12.

If you want to convert to R134a, you will have to drain out all of the mineral oil, clean the system, then add the proper amount of ester oil. You will have to convert the High/Low adapters to R134a sizes. I am sure there are some other things that I forgot to mention.

The point is that you want to do this right first time to ensure you will not have to open up the system for a long time.

 

the fact the the comp is a 91, mine is a 92, so right there they have got into the system, 2, the fact of the access ports are for 134-a...Some one would have had to put those in upon changing refrigerant, and comp...I think what ima gonna do is, once i get to the Fan/Evap, area, see what the Expansion valve is and go from there, I kno for sure that a TXV Valve for r-12, wont work very well for a r-134-a system...LOL, typical of this car... Guy I bought it from was a oil field worker/ Thought he was a Honda Mechanic...lol... Another long process to figure out what was done...R-134-A came out the year I got hurt, So its foreign to me...That what gets me the most, ps, found a sticker under hood that the system was changed to r-134-a, but with that old comp, I just dont kno, Dude said the A/C works but just needs a charge... Ya... I bet . LOL... Guess I lll find out...

 

A new receiver/drier is a good idea also. Check around the compressor clutch rotation plane for an oil/dirt accumulation ring from slung-out oil from compressor. This would indicate a leaking shaft seal. Good used compressors are readily available from ebay or car-part.com.

good luck

 

So what I called the accumulator, u call a reciever, that part is also a Drier ??? Yah, I will change that out for sure then...That will do nothing But HELP the entire closed loop, wuz wondering about that...cool, now I kno...ty very much for your input....Sure appreciate it ! ...Dave... Another question, the Expansion Valve should be marked as to what type of refrigerant it is for, right ???

 

Actually, I've never done a conversion, only maintenance on existing systems. I've read (autoacforum) that changing the expansion valve is not necessary. I doubt they are marked other than part numbers. Suggest a bit of research at that source for R134a conversions.

Most posters seem to say that retrofit of the early 90's Accords will produce adequate but not spectacular cooling. This seems likely since they were'n that great w/ R12. I bought a partial-filled container of R12 when all this conversion hysteria started. That lasted until I sold my 90 Accord several years back.

good luck

 

Yah, Ill do some checking. In Home/Building HVAC and Refrigeration, the expansion valve is key to correct operation, but Now a days they have other ways of actuating the refrigerant flow...Thanks for all the info, now I just have to wait for awhile, Thats my spring project !...lol