depmike38
Junior Member
I know oiling problems and cam/lifter issues have been beat to death but I went to use my 21 Bighorn after it sat for a week and once again had to listen to it chatter until it settled down. I'm through the last of the "free" oil changes I got when I bought it two years ago (I do add Lubeguard when I get home) but to this point it's been run on the factory oil. All of my other vehicles are on Mobil1 oil and filters. The latest excuse I received about the racket from my dealer of choice, and this was from the service manager, is that the Hemi block is tall? and it takes a few seconds to push the oil up to the top of the engine which is where my question comes in as I have never torn down a Hemi this being my first non-Ford or GM purchase. Does this engine(height notwithstanding) not have any form of an anti drain back valve in it's oiling system that holds oil up in the lifters when it's shut down? I remember something having to do with a Toyota or Nissan in the 70's where on shutdown all the oil in the top of the engine drained back to the block and they ran somewhat dry on startup and they had to create a fix for it. This just seems like a similar problem and that the oil simply isn't staying in the lifters/top of the engine which no variation of oil, filters, and additives can compensate for.