DENSO uses ND-oil 8 for its R134a type refrigerant compressors, a PAG 46 oil. The new refrigerant type uses ND-oil 12, also a PAG 46 oil but with additives specifically for the R1234yf type refrigerant. It can get confusing with the number of different compressors, each with a specific DENSO oil.

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Keeping this in view, what is PAG 46 oil used for?

PAG oil, or Polyalkylene Glycol, is a fully synthetic hygroscopic oil specifically designed for automotive air conditioner compressors. It is used in R-134a air conditioning systems to lubricate the compressor. When looking at PAG oil you will notice various numbers such as PAG46 or PAG100.

Secondly, what type of PAG oil should I use? With R-134a, there are primarily three different viscosities of PAG oil being used: PAG 46, which is the most popular viscosity oil; PAG 100, which is also common; and PAG 150, which is not often used, but it is still required for a certain compressor used in some GM vehicles from the '90s to the early 2000s.

In this regard, can I use PAG 46 instead of pag100?

There is a difference in the viscosity (thickness) of PAG 46, PAG 100 and PAG 150. Plus, using anything other than the specified viscosity of PAG oil in systems that require it voids the warranty from many of those compressor manufacturers.

Do I need to add oil when recharging AC?

You normally do this when recharging the system after replacing one of the major components. This is tricky. The service manual normally tells you how much refrigerant oil should be added with each major component replaced on the AC system. Off-the-shelf cans sometimes come with refrigerant oil in them as well.

Related Question Answers

Can you add too much oil to AC compressor?

While installing a new compressor or any other parts in your AC system, it is imperative that you add the correct amount of oil. If you add too much oil to the system, it may pool in various places of the system and can coat the inner walls of the evaporator and condenser coils.

What happens if I use the wrong PAG oil?

Using the wrong oil may allow current to short circuit back through the A/C compressor, creating a shock hazard. Mineral oil should only be used in older R-12 A/C compressors because R-12 will not mix with R-134 refrigerant. This can lead to poor lubrication and premature compressor failure.

How much oil do I put in my compressor?

For a new compressor, look up the specifications of your AC system. An average car might use a bit of oil (4 oz. ) and two cans of refrigerant R-134a (12 oz.)

What type of oil do you use with r134a?

Polyolester oil (POE oil) is a type of synthetic oil used in refrigeration compressors that is compatible with the refrigerants R-134a, R-410A and R-12. It is recommended by experts as a replacement for hydrofluorocarbons (HFCs).

Do new AC compressors come with oil?

New, R12 Rotary compressors come with a full system charge of Mineral Oil, which is compatible only with R12 refrigerant. New 134a rotary compressors come with a full system charge of PAG oil, which is compatible only with 134a refrigerant.

Can 134a and r12 be mixed?

A: yes and no.. yes you can get a port adapter and put some 134a in the system but that doesn;t mean that it will work. chances are that the front seal is leaking and 134 will actualy leak faster then R12. as you use it the front seal "might" close up some.

What oil do I use for my AC O ring?

Re: A/C System - What oil to use to lube o-rings? If it uses R134a then use PAG oil (Polyalkylene Glycol) and if it uses R12 (old gas) then you can use mineral oil. If you use mineral oil on the O rings of an r134 system (they are usually green) they will dissolve and it will leak.

Is pag 46 compatible with nd8?

DENSO uses ND-oil 8 for its R134a type refrigerant compressors, a PAG 46 oil. However, this doesn't mean the two oils are interchangeable; while ND-oil 12 can be used for both R134a and R1234yf, it doesn't work the other way around and ND-oil 8 cannot be used for R1234yf type refrigerant.

Does r134a have oil in it?

Yes there is oil in the system to keep the compressor lubricated. It is carried throughout the system in the refrigerant. It is usually added in when the system is charged.

How do I know if my AC compressor is bad?

Symptoms of a Bad or Failing AC Compressor
  1. Cabin temperatures higher than normal. One of the first signs that a compressor may be having trouble is the AC no longer blowing as cold as it once did.
  2. Loud noises when the compressor is running.
  3. Compressor clutch is not moving.

How do you flush an AC system?

How to Flush :
  1. Remove Refrigerant. Recover all of the refrigerant according to local requirements/laws.
  2. Dismantle AC system and remove components not being flushed.
  3. Dismantle the system components being flushed.
  4. Evaporator .
  5. Start flushing.
  6. Component reassemble / replacement.
  7. Purge the system.
  8. Vacuum, leak test and recharge.

What kind of oil goes in a Sanden compressor?

All Sanden R-134a SD7H15 piston compressor models use Sanden SP-15 PAG oil for service. SD5H models are shipped with SP-20 PAG but can be serviced with SP-15 PAG.

Does PAG oil absorb moisture?

As a well established specialist in mineral oil based lubricants, Idemitsu ranks as the world's leading manufacturer of PAG oils for vehicle air conditioning systems. PAG oils are by nature hygroscopic. That means they quickly absorb moisture.

What color is AC compressor oil?

Refrigerant or PAG (synthetic compressor) oil is clear, he explains. Over time, it picks up moisture and turns acidic, eating away at the condenser, thermal expansion valve, evaporator, fittings, compressor and other metal components. Gradually, the oil turns yellow and darkens as it picks up particles and sludge.

What is the difference in PAG oils?

PAG oils are harsher than mineral oils, and may cause skin irritation and damage O-rings and seals. There are different viscosities of PAG oil being used by OEMs: PAG 46, which is the most popular; PAG 100, which is also common; and PAG 150, which is more rarely used.

What is oil charge?

As refrigerant is discharged from a compressor, so is a small amount of refrigerant oil. The required oil charge for a system is basically a factor of the amount of refrigerant in the system and the compressor's oil pumping rate.

Can low oil cause AC to stop working?

Inadequate oil lubricant. To take the heart comparison a step further, think of your air conditioner's oil lubricant like the blood in your body. If there's not enough, the system can't work properly and all kinds of problems can result, including AC compressor failure.

How do I remove oil from my car AC?

Even if there is no debris this should blow out excess oil. From there you can remove and drain the compressor (upside down on a bench overnight with a rag underneath can do the trick), add the proper amount of oil, then recharge the system.