Diverter valve leaking.

Infinity 1290 LC-MS, diverter valve #5067-4241. Our diverter valve is leaking during sample runs. I replaced the rotor seal and all connected capillaries. I made sure that there are no obstructions in the valve head. The unit does not kick out any errors and chromatography looks fine. Also, no pressure issues. But the leak will cause a shut down if unchecked. All of the valve head bolts are tight. Please help before I buy a $4K new part.

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