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How much R134 PAg Ac oil goes into my 1994 Chevy truck 5.7

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Total Amount of AC PAG oil needed for a 2000 Jeep Cherokee sport

Do you have the old compessor? Drain out what is in there and use that amount as a guide + 1 oz. There is no ratio per se. As long as you are close without being crazy low (none) or crazy high (over flowing), you're good.

Posted on Apr 14, 2009

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SOURCE: 01 sunfire a/c not working

Is the fan running while the compressor is running?

Posted on May 04, 2009

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SOURCE: Want to charge ac on 1994 Chevy truck 350 4WD and

ALWAYS add to the low pressure port. That will be the LARGE pipe.

Posted on Jun 09, 2010

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SOURCE: Replaced a/c compressor on 1994 chevrolet truck

unless you can verify what the pressures are you will need to have a shop check it for you. Low pressure will give the symptoms you stated. Also if you did not vacuum all the air out before you added the stuff then a shop will have to perform a a vac and recharge. Plan on paying the piper if you did not do this yet. You can only accurately charge a system after a vacuum has been put on the system and then held there for a time to see if the vacuum stays.

Posted on Jul 07, 2010

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SOURCE: how many pounds of r134 and how much oil ozs.

somewhere around 1.6 pounds (1lb.14ounces) of R134a if system is evacuated and 3 ounces of oil with new compressor.
keep pressure on the low side around 34-37psi & it should blow snow. Below are normal car AC pressure readings with 134A.

  • Normal readings on high and low side with AC OFF (static pressure) – Depends on outside temperature, but normally is between 80-105 PSI
  • Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s – Ranges from 25-35 PSI –
  • Normal high side reading ranges from 200-350 PSI
Don’t assume that if adding little Freon is good that adding a lot is better! Overcharging just a little can decrease the performance of the system and possibly damage the compressor.
DIY recharge kit:
With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold – STOP don’t overcharge the system.
Thank you for using fixya and be safe.

Posted on Jul 19, 2010

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Hi FOlks. We are trying to find out how much AC oil to put into the new AC compressor? Can someone advise? Thanks. Jim & Carolyn

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What type of freon is in a 1994 GMC Suburban

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