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In-line filter: to add or not to add?...

U-96 on Fri June 27, 2008 9:28 AM User is offline

Year: 1995
Make: VW
Model: Golf Mk 3
Engine Size: 2.0L
Refrigerant Type: R134a
Ambient Temp: Hot!
Country of Origin: United States

I am about to replace the compressor, and while waiting for a new one to arrive I am contemplating the idea to add the universal in-line filter from the ACKit to my system.
Pros:
- I realize my flushing/cleaning of the A/C system is going to be far less than perfect.
- It is a 13 years old system, so some extra cleaning probably won't hurt...
Cons:
- Cutting a perfectly fine line, introducing two new connection points and an element that never was the part of the design may contribute more to the problem than to solution.
- The oil in the system does not look very dirty and debris contaminated, so maybe the system is not that dirty after all.
- The failed part of the old compressor seems to be a control valve, does a breakdown like that introduce a lot of debris?

Any comments and suggestions are very appreciated.

Edited: Fri June 27, 2008 at 9:30 AM by U-96

mk378 on Fri June 27, 2008 10:26 AM User is offline

No, the control valve won't introduce debris. It's when the moving parts of the compressor shred themselves up that you'll have debris. Compressor replacement due to a leak or control valve failure you really don't need to flush, though that helps to be sure the oil charge is correct. Otherwise you're guessing how much oil to add instead of starting at zero and putting in the specified amount.

bearing01 on Fri June 27, 2008 11:24 AM User is offline

You don't need the filter.
The receiver-drier canister has its desiccant encased with felt... to act as a filter. Cut your old one open and check it out. Just replace the receiver-drier and you're good to go. The control valve doesn't create metal debris.

Your RCV failed, not the compressor itself.

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