I used these instructions when I set my lash with the engine off. (But engine hot after long drive)
...link... I would really like to see a video of someone setting the lash with the engine running.
I young guy was walking around the nieghborhood and heard my truck running. I had the hood up parked in front of the house.
He asked me whats wrong with my engine.
I told him they just sound like that.
