Quote:
Originally Posted by dkr
My recommendation would be to replace them as they start to leak or visually show they may fail soon. I have had that temptation when trying to fix Mercedes things and invariably you will find (especially often with a pro) that they will end up creating new problems due to their inexperience with the system that did not exist before. I know nobody would admit to it, but that happens frequently. Also, many newer products are not made as well as the old OEM ones. I have also had that happen numerous times. It will also be a lot harder to isolate individual problems if you just replace everything at once, but it is often a good deal for the guy selling the work.
Dkr.
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"My recommendation would be to replace them as they start to leak or visually show they may fail soon"
Every time a system is opened, the drier has to be replaced. Every time the system SHOULD be flushed, and new oil put in because the oil leaks out with the refrigerant. The only way to know how much oil is in the system is to start fresh every time. If a hose is replaced, and six months later another hose leaks, you are back where you started. Why is there always time and $ to do a job over, but not enough time and $ to do it right the first time? Like I said, ALL the rubber hoses should be replaced. Even if all the hoses, TXV, Drier and Orings were replaced and the system flushed, vac'd and charged, most R4's are ticking time bombs= it is just not worth it. Also, with the higher pressures from running R134a, the probability of the case slipping on an R4 (very common) is increased. Again, replacing components (hoses) as they exhibit problems (leaks) is a false economy. Do yourself a favor and do it right the first time, you will be glad you did. That is MY recommendation.........Rich