[Gmecm] OT - alternative refrigerant test... HFC152A

Sun May 26 21:17:25 UTC 2013

Carl, very happy you found it useful. I'll keep posting as the summer 
progresses, how it's keeping cool as the weather heats up.
David

----- Original Message ----- 
From: <carl-otto at cckengine.com>
To: <gmecm at diy-efi.org>
Sent: Sunday, May 26, 2013 12:42 PM
Subject: Re: [Gmecm] OT - alternative refrigerant test... HFC152A

> David!
>
> Thank you for sharing this information and for the detailed explanation
> and videos that makes it possible to do the same on my own cars some day.
>
> Regards. Carl.
>
>
>> Here is another video, charging my Rusty the Duke with HFC-152a
>>
>> Watch at the end, I cut up and explain how the accumulator works.
>>
>> http://www.youtube.com/watch?v=i4uAXDyICsA
>>
>> Sincerely,
>> David
>>
>>
>> ----- Original Message -----
>> From: "Eck, Joel" <Joel.Eck at hp.com>
>> To: <gmecm at diy-efi.org>
>> Sent: Monday, May 13, 2013 11:52 AM
>> Subject: Re: [Gmecm] OT - alternative refrigerant test... HFC152A
>>
>>
>>> If the fins are basically straight so that airflow is not hampered, and
>>> there isn't 31 years of oil and dirt caked on it, then it's probably OK.
>>> Heat will transfer through the metal regardless, there isn't any magic
>>> coating that enables heat transfer.
>>>
>>> That being said, if the compressor ended up losing bits of itself in the
>>> system, you don't want the trash that traveled through the system to be
>>> left in place to later become dislodged and eat up your brand new (or
>>> refurb'ed) compressor. IOW, it's the insides of it that I'd be far more
>>> concerned with than the outsides of it. If there's no evidence of 'black
>>> death' inside the lines, you might be ok.
>>>
>>> I'd hose down the outside of it real well with brake cleaner (with the
>>> ports well capped off, just to be sure).  If you're still not sure about
>>> the insides of it, I've seen something that was billed as a system flush
>>> for things like condensers, lines, and evaporators, but I've never used
>>> it
>>> so I don't know how to use it or how well it works. Searching amazon for
>>> 'A/C system flush' results in good hits for it. Apparently you will need
>>> the liquid and a device for pushing the liquid through the system.
>>>
>>> Thanks,
>>> Joel Eck
>>>
>>> -----Original Message-----
>>> From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On
>>> Behalf Of Jay Vessels
>>> Sent: Monday, May 13, 2013 10:52
>>> To: gmecm at diy-efi.org
>>> Subject: Re: [Gmecm] OT - alternative refrigerant test... HFC152A
>>>
>>> Hi there!
>>>
>>> What is the preferred home method for flushing the condenser and
>>> evaporator?
>>>
>>> Dad and I have done several R12->R134a conversions.  We change the
>>> orifice tube, receiver/dryer, and all the O-rings.  If the compressor is
>>> good, it stays, as well as the evaporator and condenser.  That said,
>>> there's a reason the R12 leaked out, so that needs to be addressed
>>> (unless it was the R4 compressor that blew up, which is a different
>>> discussion).
>>>
>>> David's HFC152a conversion has piqued my interest.
>>>
>>> My truck's 31 years old this month, and has all of its original hardware
>>> on it.  It's still holding R12, but the compressor has stopped
>>> compressing.  I'm replacing everything but the lines, evaporator, and
>>> condenser.
>>>
>>> Dad's trying to get me to replace the condenser, too.  His argument is
>>> that it's been at the front of the truck, eating everything the road can
>>> throw at it for 31 years, and a new one not mashed full of debris that
>>> may not all come out even with a thorough cleaning would likely perform
>>> better.
>>>
>>> Jay Vessels
>>> 1982 Chevrolet S-10 Sport, 2.8V6 TBI
>>> 2006 Pontiac Solstice
>>> 2007 Subaru Outback L.L. Bean, 3.0R
>>>
>>>
>>> On 05/13/2013 11:36 AM, Aaron wrote:
>>>> I have had good luck with just dropping in R134a in to late 70's GMC
>>>> Evap
>>>> /
>>>> Thermal expansion valve systems.
>>>> Typically all the o-rings get replaced, but only because they are SO
>>>> OLD.
>>>>
>>>> -----Original Message-----
>>>> From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On
>>>> Behalf
>>>> Of Gary Evans
>>>> Sent: Monday, May 13, 2013 11:15 AM
>>>> To: gmecm at diy-efi.org
>>>> Subject: Re: [Gmecm] OT - alternative refrigerant test... HFC152A
>>>>
>>>> Not easily done from a chemical standpoint I suppose. It's not for lack
>>>> of
>>>> trying there is (or perhaps, was) billions of dollars to be made with
>>>> an
>>>> easy replacement.
>>>>
>>>> I have had very good luck with drop-is R-134a replacement on mid 80's
>>>> Japanese vehicles. Dryer and oil change only - kept all the old hoses.
>>>> It
>>>> typically goes about 5 years between needing top-offs.
>>>>
>>>> -Gary
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>>
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