Quote:
Originally Posted by humfrz
Agreed, sounds normal.
I reckon it's just the valve lifters indicating that they have some clearance - which is a good thing.
Back in the day, with solid lifters, if you didn't have that sound after you adjusted the valves, it usually meant that they were adjusted to tight and one could expect some burnt valves on down the road.
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The rocker pivots are solid. They are not lifters...kinda. Valve lash is a bucket that goes over the top of the end of the valve stem. You swap out different sized ones to set valve lash.
The rocker pivot sits in an oil galley in the head. One end of the rocker arm sits on the pivot, the other end sits on the top of the valve stem with the bucket lash adjuster in between. There is a roller in the center of the rocker which is driven by the cam.
Most noise that we hear is either the DI injectors firing, or the HP fuel pump. The HP fuel pump is to the right of the oil filter(if you are facing the engine bay from the front) and is driven by 3 lobes on the intake cam. If you set your hand on it with at an idle it pulses.
Rocker failure will always throw a code for a miss fire. That is if the rest of the engine doesn't let go in the process.