If it was me this happened to I would do exactly what you are doing...go back, take it apart again, confirm everything is the way it is supposed to be, use new crush washer and o-ring and re-assemble it. Sometimes that is all it takes to fix the problem. Let us know how it turns out in the end, good luck.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz