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96' Mercury rusted accumulator

romanmouse on Wed August 20, 2008 10:28 AM User is offline

Year: 1996
Make: Mercury
Model: Grand Marquis
Engine Size: 4.6L
Refrigerant Type: 134A
Country of Origin: United States

I just noticed that the accumulator that is located just before the evaporator in the engine compartment of my 1996 mercury grand marquis is rusted and leaking ever so slightly. My A/C works great now and I want to replace it before I run into problems. I have ordered a replacement accumulator. It has a flange type connection on one side of it with a nut and a spring lock on the other. I own a Ford spring lock tool that should work to release the spring lock side. Is there any special things I have to look out for while replacing this device? Does it contain oil that I need to replace? Will I need to vacuum the system? I have access to refrigeration tools and I am somewhat knowledgeable to refrigeration systems as I repaired domestic household refrigerators about 20 years ago. Any insight to this task would be greatly appreciated as I do not want to render the system inoperable.

TRB on Wed August 20, 2008 10:41 AM User is offlineView users profile

If the accumulator was ordered with our company I did not see it the order this morning.

Good to replace the garter springs and o-rings. Nylog is also a plus when replacing o-rings. You should also replace the amount of oil drained from the old accumulator plus .75 ounce. You always need to follow the evacuate & charge procedures after a repair has been done.


When considering your next auto A/C purchase, please consider the site that supports you:

Edited: Wed August 20, 2008 at 10:42 AM by TRB

romanmouse on Wed August 20, 2008 10:59 AM User is offline

When I clicked on "select vehicle" my model year was not available. This was a couple of day's ago. I do not know why but I do see it now. The accumulator is the same price as the one I ordered from another source. I would have been happy to purchase it from you had it been available at the time I was shopping for it.

romanmouse on Mon August 25, 2008 11:36 AM User is offline

Thank You for the information. The reason that my vehicle year was not listed in your product pages was that I clicked on "Marquis" instead of "Grand Marquis". I did receive my new accumulator and I am happy to say that it is aluminum. Not steel. Hopefully the car will rot out before that part does. I will change it like you indicated and hopefully all will be well. Thanks again.

mk378 on Mon August 25, 2008 12:09 PM User is offline

Drill a hole in the bottom of the old accumulator to more fully drain it for an accurate measurement. Some will still remain absorbed in the desiccant, thus the advice to add 0.75 oz more. Your car uses PAG 46 oil.

romanmouse on Tue August 26, 2008 2:50 PM User is offline

I changed the accumulator this afternoon. All went well except that the old one was rotted so bad that I could not drill a hole in the bottom of it. I had to drill it near the bottom on the side. Got all the oil out clean and poured it in the new accumulator. Vacuumed it down to 30 inches for one hour and then closed the low side valve let it set for about a half hour and no loss of vacuum. Installed 38 ounces of 134a and was getting 38 degrees out of center vent on high. It was 76 ambient. Thanks for all the answers.

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