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Post Info TOPIC: AC Redo 3.0
SShink


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AC Redo 3.0
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Last September when I drove the Malibu to Kansas City, the AC gave out after 5 continuous hours of operation due to losing all the freon through a cracked weld on the back of the hose going into the compressor.  That 383 shook things to death, and even broke the hose bracket weld, so it was under a lot of vibration.

Finally got a new hose ordered to fit the mid-80's AC components that had been installed down in Kansas for the conversion, then had Auto Air Conditioning in Blaine modify the hose as needed and had it evacuated and charged at Cedar Creek Auto near my house.  The AC throttle solenoid is working like a charm bumping the idle up a 100 rpm or so when the AC kicks on also.  Now it's blowing 40ish degree air!  nana

Thanks to Pittman Performance also for fabbing up the factory looking intake manifold bracket needed with the Vortec based intake manifold to keep the back stock compressor bracket.  tiphat

 

Yesterday was a cooler day, so may have to have the freon adjusted when it's hotter/humider, but it WILL get used going to KC for the Mid-America Chevelle Show!



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Stan S.-Twin Cities 'South Metro'

1972 Malibu Convertible 2nd time around 

1999 SS Camaro LS1-6 speed

Forum influenced terms: 'Link Paste', 'Stanitized', & 'Revolving garage door...' 

 
dashboard


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It is so nice to have A/C, makes the car soooo much more enjoyable.
I'm curious. What is the can or tank on the discharge side of the evaporator were the POA valve would normally be installed? Does your compressor cycle now? Is the plug with the green wire behind the the can connected to the/a pressure switch?
I know, so many questions.

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Kevin

Northwestern Ohio
more ambition than brains


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reciever/dryer?
Karl

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More ambition than brains,

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Lost in the 60s


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more ambition than brains wrote:

reciever/dryer?
Karl

 About the same function but called an "accumulator". I don't remember it having a "drying" function like the older systems had. The orifice screen, that replaces the POA valve, is the next part downstream.



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Mitch D.   River Falls, WI

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Some Assembly Required

1966 Chevelle SS 396 M20

1970 Chevelle SS 396 M20

1967 Camaro SS 350 rs
Bobs_Place


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"CCOT" or cycling clutch orifice tube system. There is no expansion valve, the receiver/dryer is replaced by an accumulator and is installed after the evaporator instead of after the condenser. There is an orifice tube that acts similar to an expansion valve and the compressor is cycled to regulate temp at the evaporator. The accumulator caches any liquid refrigerant and separates it from the gas just ahead of the compressor as any liquid could cause damage to the compressor. The accumulator also acts as a filter/dryer. As I recall GM switch to this type system in the late 70s or so, had a 82 Blazer with this type system.



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Bob W.

Lino Lakes
SShink


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If I remember right the accumulator is from an 85 Astro van.

The clutch does cycle on and off. 



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Stan S.-Twin Cities 'South Metro'

1972 Malibu Convertible 2nd time around 

1999 SS Camaro LS1-6 speed

Forum influenced terms: 'Link Paste', 'Stanitized', & 'Revolving garage door...' 

 
more ambition than brains


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Sooo, do they still recommend replacement of "accumulator" when system is catastrophically" breached?

Used to be if system was open for significant period or punctured releasing Freon' it was recommended for replacement.

Just curious??
Karl

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More ambition than brains,

If you have more than 5 of anything, best to stop counting!
Bobs_Place


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more ambition than brains wrote:

Sooo, do they still recommend replacement of "accumulator" when system is catastrophically" breached?

Used to be if system was open for significant period or punctured releasing Freon' it was recommended for replacement.

Just curious??
Karl

 Yes, highly recommended!!!!!!!!!



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Bob W.

Lino Lakes
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