I am working on a 88 E150 with a 5.0 engine
We are replacing the AC system and will be charging it with R12. We have all new parts except the compressor Oil. The compressor is a Motorcraft YN-53, also known as E6DH, E7VY19703A. Ford says they can not go back far enough to find the information on what oil to use with this compressor. Research I have done from part sites say it was used on various fords from 88 to 93 and is supposed to be fairly common on broncos and F series trucks..

My ford service manual says to use YN-2 oil BUT
YN-2 or C9AZ 19577-B Is not for my compressor..
here is a bottle I found that was sold
MOTORCRAFT YN-2 REFRIGERANT COMPRESOR OIL
It says for York or Tecumseh compressors

Also found a parts list
C9AZ 19577-B *YN-2 Refrigerant compressor oil - used with York or Tecumseh compressor
Paraffin mineral oil 500 viscosity

D1VY 19577-B *YN-4 Refrigerant compressor oil - used with Frigidaire compressor
Paraffin mineral oil 500 viscosity

Then the next oil I find is YN-9-A or F73Z-19577-AA.
Paraffin mineral oil 300 viscosity.
i have a ford service manual for a 1991 town car, crown vic, and grand mark. They use a FX-15 compressor and the YN-9-A is the oil specified for that compressor..

I have read that the E6DH compressor is a FS6 "Style" compressor.

If any of you guys has a service manual for your truck anywhere from 88 through 93, It would be greatly appreciated if you could look and see what type oil is specked for your R12 compressor and let me know...

I do know that ford uses a special paraffin mineral oil and that wax free oil sold at NAPA will not work..

thanks
Anna

 

WEll I did some checking on RA and came up with

f150 1982 - 87 used a fs6 compressor
88 used a SD709, fs6, and E6DH
89 - 93 used SD709, FS10, and a couple of other different models


So i guess I am particularly interested in what oil was used in 1988 since they list the E6Dh for that year..
Perhaps what was used in the FS6 would be the same

 

10W-30? Or 5W-30 for colder weather conditions?

 

He is requesting information on compressor oil.

 

If you're completely re-doing the AC system, why would you go back to R12?? If it's all brand new, I'd go the safe route and use R132 it's fairly cheap and you can get the oil and refrigerant right at the local parts store.


If you're using the old compressor then pull a vacuum and flush the system change your O-Rings and you'll be good to go with the R132....Just my opinion

 

What the heck is R132? I've never seen it at an automotive parts store.

Assuming you mean R134a (please correct me if I am wrong) I am not a fan of converting. R12 is a better refrigerant and widely available without having to sign off on your first born child. Personally I think the OP would be fine with either mineral oil but I understand their quest for the correct one.

 

Yes sorry...rough day today...i meant r134. I don't know where you live but r12 in the chicago area is going on average of $55 - $75 per pound as opposed to r134a averaging $2 - $6 per pound...but there are those who think r12 is better...i actually have a bottle of synthetic r12 but i haven't had the chance to try it because eveyone i know has switched to the r134a

 

Why did I choose to go back with R12?
I think one of the main reasons has to do with the replacement parts I bought along with information I have been reading about converting older r12 systems to R134a.

The original factory compressor on the van had been replaced at one point
(before I bought it) and had been replaced with a rebuilt compressor which I found to be locked up. I had no idea why the compressor locked up or how much trash could be inside the system, so I decided to just replace all the parts.

1- I found a brand new Motorcraft OEM condenser for $50 and bought it. The condenser is the serpentine style used in that era, while newer style condensers are a parallel style. From what I have read, R134a is slightly less efficient when used in the serpentine style condensers.

2- I bought all new hoses, there are 4, all but one is Motorcraft oem. There is allot of information about R134 slowly seeping through hoses designed for R12 because the molecule size is smaller in R134 . Newer hoses have a barrier designed to prevent this. One article stated that this is true in hoses without the barrier until they have been broken in with R12 and mineral oil. After the R12 hoses have been used for a while the mineral oil has a chance to seep into the hose material creating its on barrier that was found to prevent the R134a molecules from from seeping through the lines. So for those who convert from R12 to R134a and have problems with loosing freon, it would most likely be seals or o-rings.

3- Several articles mention that the high side pressure is slightly higher with R134a then R12. Though it is only slightly higher, it seems this would put more strain on the compressor and reduce the life of the compressor slightly. I am not sure if it would really affect fuel economy much at all..

So given all the above, wither fact or fiction, I decided to go back with the R12 for now.

If I had bought a new style condenser, had all the old lines rebuilt with new hoses, and bought a newer style compressor designed for R134a, I would have gone with R134. In the future if I have a problem, I will probably flush everything and go back with R134a. I believe though that if the installation is done right, it should last for many years without problems.. We will see.

 

Put me down as another vote for R134. All you need to change at this point is the metering valve (some say get a variable) and the setpoint of the pressure switch with a screwdriver.

Who cares if it leaks through the old style hoses. It is many times cheaper than R12 and you can top it off many, many times for that price.

Systems all leak anyway and that R12 is going to be a lot more expensive to replace if it leaks for any reason (new old stock hoses being one thing I am thinking of)

 

Down state I can score R12 for $10 - $15 a pound. I have tried a few drop in replacements for R12 back when it was $75 - $100 a pound with good results. Now that the price of R12 is reasonable again no sense to use anything else IMHO.

 

Well I have 5 lbs of R12 on hand, so buying it is not an issue..

Interesting point you brought up about the NOS hoses.. I checked and 2 of them do have barrier hose on them. The one that doesn’t comes off the compressor and has the high and low side hose made on to the manifold connection. That one was almost impossible to find, but I did find one and for $50. The suction line on that hose has a muffler built onto it so I couldn’t just have the hoses replaced because I was told that you can not clean out a muffler because of the baffles in it. Now that i have a hose with anew muffler, i could have them replaced with barrier hoses.

The line that goes from the condenser to the evaporator, that is the non Motorcraft hose and I really don’t like it because it has thin aluminum tubing and if you try to bend the rubber hose very much, it will kink.. I may take the original one off the van and have a new hose put on it.. Interesting mix of steel and aluminum there..

One of the Ford TSB’s says to install a in-line pancake filter and run the AC for about an hour , I believe, then remove it.. I wonder if that is really necessary with everything brand new?

TSB 98-12-5
http://www.thedieselstop.com/faq/949...les/981205.pdf

This TSB also says
REMEMBER TO USE YN-9-A (MINERAL) OIL WITH R-12 SYSTEMS

Here is yet another TSB that mentions YN-9-A oil.
Article No. 97-10-5
Ford Workshop Manuals > Thunderbird V8-281 4.6L SOHC (1994) > Maintenance > Fluids > Refrigerant Oil > Component Information > Technical Service Bulletins > All Technical Service Bulletins: > 97-10-5 > May > 97 > A/C - Insufficient Cooling/ Compresso
NOTE:
USE MOTORCRAFT YN-9 REFRIGERANT COMPRESSOR OIL FOR 1993 MODELS EQUIPPED WITH AN R-12 SYSTEM. FOR 1994 AND LATER MODELS USING AN R-134a SYSTEM, USE MOTORCRAFT YN-12-B POLYALKYLENE GLYCOL (PAG) REFRIGERANT COMPRESSOR OIL.

Here is yet another TSB about retrofitting systems to R134 and specify the parts needed. it is pretty much replacing everything except the evaporator.
TSB 98-4-8 : R-134a conversion for r-12 equipped Probes
In the TSB they state:
Ford recommends the use of R-12 in R-12 A/C systems as long as it is available and cheaper then retrofitting to R-134a.


Interesting my manual says YN-2 oil and so did 2 ford dealers... But these TSB state different...

 

Here is a good article about wither or not to convert to R134a
1993 Ford F150: The A/C Compressor..seized..blown..step instructions

 

I found a guide that suggests the Ford/Motorcraft compressors (FX-15, FS6, 6P148) are all made by NipponDenso, and all use the same viscosity fluid.

So I'd use the 300 viscosity if the E6DH is an "FS6" style compressor.

 

Do you have a link for that site? I know some you cant post here...
thanks for the reply and taking the time to do some research.. I am not at all disputing your comments either, just giving an example of what I am going through trying to find out this information... It seems like everyone forgot about r12 in the last 12 years.. I need to find a good ford mechanic that wasn't a baby when the van was built and would remember what it used!



"E6DH is an "FS6" style compressor" And there we go.. Style,, but does it use the same oil? Ford apparently doesn't know that answer.
I have some NY2 500 visc and some NY9 300 visc., Maybe I should just use 5 oz of each and pray it works! That should be 400 viscosity!

See here is another example: According to this it is not a FS6 style, but a FS6!
I came across a site called NVB Equiptment. Commercial and Agricultural Air conditioning & Fire Suppression Systems Specialist,, Sales * Service * Installation
NVB Equipment

They have a extensive PDF file on compressors
http://www.nvbequipment.com/07Comp_2015.pdf

On page 2 they list compressor oils. For the Ford FS6/6E171 it lists 10 oz. 500 visc. for R12 That would be 500 viscosity mineral oil. Since Ford used the paraffin oil, that wold be the NY-2..
According to this company...

On page 14 they list the 5470 compressor as FS-6 CROSS BOLT (TANGENTIAL) MOUNT (12v) Part No. 5470

There is a complete list of Ford compressors and they list 3 different FS6 compressors. On page 15 is model 5470, it looks like mine. The other two are flange mounts and have 4 holes on top of the manifold where mine has only 2.


"I found a guide that suggests the Ford/Motorcraft compressors (FX-15, FS6, 6P148) are all made by NipponDenso"

And yet here we have
The "Swashplate" design FS6 was built by both Nippondenso and Ford and is constructed basically like the Seltec.
Automotive AC Information Forum - ACKITS.COM

The FS6 is verry similar to the Nippondenso compressor used in the 1988 Porsche 911
Automotive Air Conditioning Bulletin Board ? View topic - FS6 rebuild


Every time I think i have it figured out,, something opposite comes up!

And from what I have been reading, even if using r134a, different compressors use various different pag oils. Just like with the mineral oil, perhaps the compressor runs for 4 or 5 years just fine and then one day stops. Maybe it had the wrong oil in it, maybe a different oil, it might have lasted 10 years..
My 85 e150 140k on it and has the original York compressor on it while my 88 only has 105k and had a bad rebuilt compressor on it which I am replacing now,,, I hope! The 88 system had been converted to R134a...

 

And here I just found like you said:
The FS6 is also a Nippondenso that shared its architecture and displacement with the A590 and the C171 used by Chrysler.
Automotive Air Conditioning Bulletin Board ? View topic - FS6 vs. 6P148