Hoping I could get some advice and direction on a issue I have encountered .the rig has 233k good oil pressure, good compression, no water in oil never had any significant problems oil was about a quart low started to here a loud tick or knock/ posted a video of it running this is the start up sound stays the same more noticeable in the low RPMs range. need help! don't want to bring it in unless I have no other resource I can backyard mechanic a bit myself. hoping you guys can help! Having difficulty uploading the 1 minute video, perhaps someone could send me a video of a distinct rod knock vs liter or others similar sounds?