Noticed a tick the other morning that seems to be erratic and is coming from the passenger front side of engine. It manifests once the engine starts to warm up and remains audible once at operating temp. The tick is hardly audible, if at all, at idle. At high idle it is notable and can also be heard when driving on the highway next to a wall etc. It sounds like it is in the vicinity of the turbo/egr cooler. Approx. 9,400 miles on truck currently. No codes (have scan gauge for monitoring) or any other issues. Boost still peaks at 35-36lbs. No driveability issues seemingly. Did note a coolant smell on occasion but only with hood open and after a longer highway drive. Coolant full and no signs of coolant in oil etc. I do have an oil sample on the way to Cummins lab in Indy. Yes I’m aware it’s under warranty but wanted opinions as to whether anyone else had this occur or have heard this. Thinking it may be an exhaust/egr cooler leak but would think it would be more profound when cold; which it’s not. This noise presented, whether by coincidence or not, after I changed from VPBE 5w40 to Delvac 1 ESP 5W40.
link to video
link to video