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  #1  
Old 09-29-2010, 06:20 PM
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a/c question

I've recently done some work on my a/c system: new dryer, repair high side hose, flushed system. Took car (84 300D) to have system purged and R134 added. Shop said vent temp down to 25 degrees, everything fine bring back in 1 week to check system for leaks. Took back 1 week later still ice cold. A/C tech found 1 tiny leak where hoses attach to compressor. I tried to repair leak by tightening bolt that holds hoses to comp. and stripped hole and all gases escaped. Rethreaded hole and put in longer bolt. Installed 1 can of R134 to make sure all seals holding. System ok. My question is: A/C very cold with this 1 can of R134, how is this possible? Should I go back and evacuate again and add refrigerant, or motor on without doing anything.

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  #2  
Old 09-29-2010, 06:35 PM
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I'm stuck on 25*F vent temps. Doesn't the evaporator ice over?

Sixto
87 300D
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  #3  
Old 09-29-2010, 07:39 PM
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No, it hasn't . Maybe the a/c tech meant 35 degrees.
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  #4  
Old 09-29-2010, 09:37 PM
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Where are you?
What is the ambient temp?
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  #5  
Old 09-29-2010, 11:03 PM
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1 12 oz can will provide great ICE cold air when it's cold/cool outside. it's all about total heat and movement of heat through phase change. if it's 70F outside, and cool in the car, 12oz will produce quite cold temps. most household freezors only hold 6 oz of 134... do you want a freezor in your car?
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #6  
Old 09-30-2010, 12:04 AM
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Temp was 98degrees at time of filling. I live just north of fresno, ca. My question is, should I excavate and fill or leave it alone. I thought whenever an a/c was opened up, you should excavate and get moisture out.
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  #7  
Old 09-30-2010, 12:32 AM
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yes. evacuation is necessary, also replacement of the reciever dryer and accurate measurement of the exact amount of oil in the receiver so it can be replaced.
the problem lies in knowing the exact amount of oil that was blown out when the manifold popped off and the compressor dumped.
best practice is to flush entire system and replace txv also, then add in exact system charge and oil as specified.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #8  
Old 09-30-2010, 12:38 AM
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smoke gets in your eyes
 
Join Date: Jun 2000
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Dang! Might as well go back to R-12 after all that.

Sixto
87 300D
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  #9  
Old 09-30-2010, 12:48 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,832
agreed, R12 will be superior in every way.
Napa has it in stock...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
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