Has anyone had issues with discharge valve failure on vilter recip's? I am not onsite to monitor operation, so it is hard to see all conditions. No sign of high oil temp or liquid coming back from recirculator. This occurs on the same valve once every 6-8 months. Checked suction strainer and is clean. looking from the top with discharge on the left and suction on the right, it is the bottom right cylinder. good oil pressure and The discharge temp is within ten degrees of the other booster next to this one. Using a infrared gun, the head temp is no different than the other heads when fully loaded. When all heads are removed, their is equal oil film on all components, so oil supply appears uniform. Thanks in advance for any suggestions.