are you sure is a valve noise?? or is a piston slap?
Hopefully just a valve lash adjustment.
I want to know the number for the valve lash adjustment.
What is the valve lash on a cummins engine 16 V
The valve lash settings, on your Caterpillar C9 diesel engine, should be set to .007. The valve lash may be slightly different depending upon the age and where of the valves.
does it have a ecotek valve fitted?
valve lash should be set at 30 thou
Valve lash is the gap between the rocker arm and valve stem on cylinder heads. Proper adjustment ensures that a vehicle operates at peak performance.
There is no valve lash. That engine has hydraulic lifters.
There is no valve adj on a 4.0l it has hydraulic valve lifters.
the cheaper cars, have no hydraulic valve lifters. (solids are way cheaper) as a motor starts the metal expanded (all if it and at different rates) the expansion make the valve stick open hot. this causes the lifters to hold the valve open all the time , causing them to glow red hot. to solve this issues. they invented valve lash , on all otto cycle engine for 100 years. called VALVE LASH or VALVE tip clearance. this lash must never be zero or interference at TDC . it must be loose (LASH) as the spark fires, and both valves closed 100% not 99%. the hydraulic lifters solve these issues by being automatic. they compensate for engine expansion. try wiki it has the whole history of this engine.
Valve lash is the gap between the rocker arm and valve stem on cylinder heads. Proper adjustment ensures that a vehicle operates at peak performance.