1995 E320 A/C manifold replacement.

411 Views 6 Replies 3 Participants Last post by sbaert, Jun 28, 2017

320forME

Discussion Starter · Jun 27, 2017

After an a/c line burst, here is my previous post for reference http://www.benzworld.org/forums/w124-e-ce-d-td-class/2841162-95-e320-high-pressure-c-hos.html I was finally able to get the right part, now how would I go about replacing this? here is a picture of the whole part Imgur: The most awesome images on the Internet The top right cylinder is a fuel cooler. so in order to do this I should just relieve the fuel pressure replace the part and then vacuum and ad the refrigerant? should I use teflon tape on any of the threads? Is it necessary to replace the receiver drier as well?If so Where is it located?

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320forME

Discussion Starter · #4 · Jun 28, 2017

sbaert said:
Never, ever use teflon tape on A/C system, but DO replace the o-rings made for R134a refrigerant. Teflon tape belongs underneath the kitchen sink, not on a car.

Always replace the receiver/dryer along with the pressure switches, without exception whenever the A/C system is opened. It is located in plain sight behind the driver side headlight.

Highly recommend you also replace the expansion valve.

And if you are not familiar with A/C systems, do not do this job yourself.

I replaced the receiver drier and the manifold and replaced the o-rings but I did not replace the pressure switches, why is it important for those as well?

mercron said:
You would need to replace the drier which the black bottle looking part near the driver side headlight.

No teflon tapes just new O rings. You'd then need to pull a vacuum that should hold for at least half an hour.

I'd suggest having a pro refill it with PAG oil and refrigerant as the quantity needs to be precise.

Sent from my iPhone using Tapatalk

I am having a shop vacuum and refill the system.

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320forME

Discussion Starter · #6 · Jun 28, 2017

sbaert said:
Because that is the best time to get at them when there is no pressure in the system, besides the fact that the original switches are pushing a 1/4 century.

If a switch goes bad in a few months, you are looking at another receiver dryer, vacuum down, replace, test, refill, etc.

Ah yeah that makes sense, if I had the money and time to wait on parts I would do that now... what parts are those? are they the ones attached to the dryer? Or are they located somewhere else? Even replacing those in the future and having the system open for an hour would really need a new dryer? What does the dryer do, just take moisture out of the system as the refrigerant condenses and expands?

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