4.8 ls ticking noise help

[OKGMC4]

Just in case anyone finds this post trying to fix their own LS ticking noises it's almost always the oil pump O ring on the pickup tube. Super common. There are 2 different sizes of O ring and it depends on what style pickup you have. These O rings get hard and crack but most of the time the story goes..."I just did a cam swap..." since you have to pull the pump and remove the pickup to put the cam in, that's when it gets pinched, twisted, or nicked. The ticking starts 99 percent of the time at cylinder 7 and may or may not show low pressure on the gauge. More O ring info here...


https://www.lsxmag.com/news/identify...-your-ls-swap/

Good luck!