Hi everyone! I'm new here and I lost my dad and inherited his 2010 jeep wrangler.. I let firestone do an oil change and they didnt put the oil filter on tight enough.. with that being said I have been dealing with a domino affect of problems.. I have recently taken apart the whole engine myself.. my question is.. I took out the lifters and discovered scuff marks on several of them.. what causes scuff marks? And what else should I replace to make sure after I put the engine back together it's going to run again? Thank you everyone in advance! Any advice is much appreciated!