freakasis

i have had at least 3 92-93 civic and everytime i change the oil, pull a vacuum, and put in new r134 it just doesnt seem to blow as cold as the 94-95s that came with r134. what do i need to change to get the system to blow as cold as the 94-95? i know the whole a/c system is differant i just wanna know if its the compressor, pressure switches, or expansion valve that are causing the differance. or if i must change the whole system to get it perfect. i have access to a place that can make me custom lines to use the r134 stuff in my system, if i know what parts i need.

thanx

SOHC_4dr

so it had R12 factory and your putting in R134? the 134 is leaking out because the molecules are smaller on the 134 and will leak past the seals which is why they have kits to make your system accept 134. i dont know for sure if yours came with R12 but if you have good vac (29) and it holds for 4 or 5 hours then your system is fine with R12 but not 134. google conversion kits so you can run 134

freakasis

so i have to change all the seals? like all the o-rings? will i need the change the seals in the compressor, or just change the compressor....
imm googleing it right now.

buff1110

i did the r134 conversion on my del sol, it blows cold but i believe r12 is colder

rickkane

^^^ Touche. I've always understood that R12 was colder, but r134 was put into duty because it's better for the environment.

freakasis

yeah but i have also had a 94 civic that had ice cold a/c...way colder than my converted 92,93s


other question: if i buy a new expansion valve and a new accumulator for the 92,93 from a part store are they going to be for r12 or r134?

mikeyoungreales

Help!
I own a 92 civic.
Where can I locally get a pressure switch for 134 in Bethesda, MD
Tried a gen honda 95 ps but wont fit

thumper64

Many parts on the R12 and R134A systems are different and won't mix. Ideally you could pull an entire AC system and swap it because R12 and R134A work at different pressures.
As for switches, you may be stuck with the old R12 one.

mikeyoungreales

compressor cuts off during super hot weather with current r12 switch so need to find work around
any online sources?
any way to get a thread adaptor so 95 switch will fit?
thanks

JDM_SOHC

yeah bro my eg hatch has a new a/c compressor and was vacuumed and filled right but still isnt even close to my friends 94 integra r134 a/c... his **** is like freeze ur nuts off, even at 100 degrees outside it gets super cold super fast... im jealous lol..

Murk 'EM

some of you guys are right some of you arnt.. the components are the same from R-12 to R-134a the only diffrences are the service ports, the "hoses" and o-rings
as SOHC 4dr said the 134a molecules are smaller and will seep thru the R-12 hoses as for the o-rings you dont NEED to change them but if you take a line off your better of replacing it with an R-134a o-ring
one thing is that i dont think any one said but R-12 used mineral oil for the system and R-134a used PAG oil.. for a retrofit you need to use ester oil because its compatibale with both R-12 and R-134a as the mineral oil will stay in the system (not all of it but traces of it will and that will hold a little R-12 and if you put R-134a with PAG oil it will be contaminated)
hopefully this clears up some confusion.. as for contamination will lower the cooling out of the ducts

slow96lude

I was told also that sometimes what happens is people use too much oil not enough r134. This will also cause this. Any a/c repair shop will have a machine that tells them what pressure is on both sides of the compressor and they will deal with that by adding more oil or taking oil out and adding r134. As for the conversion, I have never heard of having to take all the seals out and replace them. I had a 92 civic about the time that they switch everything and we just left the car running with the a/c on and vac'd it for about half and hour to get as much as we could out of the r12 and replaced with the r134 and the thing would freeze you out

thumper64

The components are the same more or less. The thermostat or something in the evaporator has a different wiring connector on the R12 system than the R134A system in 92-95 Civics. I believe there is an oriface in there also that's different. The lines don't mix, at least if you unbolt them in big huge sections. That's why I said that parts are different, they aren't easily interchangeable. The service ports aren't a big deal, the adapters are readily available.

As for the swith issue, just weld it in. Haha. But really, if it's larger, drill and tap it out. I wish I had the two systems to compare at hand right now, but I don't.

egsleepercivic

integras have different compressors, I believe they are bigger, tegs are luxury civics

Murk 'EM

the parts are exactally the same.. a line is a line it doesnt care what it carrys in it.. a compressor is a compressor it doesnt care what it compresses as long as its not a liquid
trust me i just learnd about this not even 2 days ago at my school they made sure we knew what we have to change and charge as for a retrofit
nothing about the thermostatic switch or pressor sensor has to be changed because temp is temp weather its coming out of a r 12 r 134a r 22 system temp is temp its gonna cycle the system accordingly
the FOT is the same nothing has to be changed there either the only things that need to be changed are the "soft" lines and orings when you replace the lines and the service ports
everything else will work just fine even the desiccant in the accumulator will be fine as long as you use ester oil and not pag oil used on r 134a systems you need to use ester because its compatable with both r 12 and r 134a refers

freakasis

NO, all the lines from 92 and 93 are the same. and all the lines from 94 and 95 are the same but the 92,93s are differant from the 94,95s. (look up the part numbers) not sure why honda did it. but i know for a fact they did. im not sure if each and every line is differant but every one that have tried to change is. one set of lines is bit larger than the other, i dont remember which one though. please dont post things as facts unless you know.

and as far as integras having colder air, its because the whole system is differant. the compressor was designed bigger, not to mention the condensor is twice as large. that might add to the cooling power just a little bit.

dacrxguy

This guy is correct everyone else is just mumbling.

pawl_l

onsetofpurity

https://honda-tech.com/zerothread?id=1665946

freakasis

umm.. no. look up the part numbers before you back someone. the lines are differant. at the very least the ones that go into the evap. are differant and so is the evap. because the lines dont bolt up. i know this from personal experiance as well as from the honda part numbers. stop mumbling.

JDM_SOHC

so bottom line being, an eg civic will never surmount to the colder a/c temps of an integra..??
thats weak..!!

Laz's EP

iTrader: (1)

I was wondering why my AC was'nt cooling enough, I even bought a new compresor when I first did the swap. I ws told that it could be the EVAP.