Hi All, Over the past few days my 304 sounds like it may have the dreaded flat cam lobe/lifter failure. Around 1500-2000rpm it's got a horrible rattle from the top end. It's got oil pressure but seems to be worse when warm. It's not missfiring and running as well as it always has. Vid attached, has anyone heard anything similar before? I've drained the oil and theres no chunks so hopefully it's not a bearing and I can get away with a cam/lifter swap if that is the case. Thanks all.