Hello everyone,
I’m facing an issue while assembling the timing gear on my M119 engine and could really use some expert advice.
The problem is with the intake camshaft adjuster (mechanism).
Before I tighten the central nut, the internal splined piston (actuator/yoke) moves back and forth completely freely by hand. There is absolutely no binding, catching, or resistance.
However, as soon as I torque down the central nut to specification, the piston completely locks up and binds. It stops moving entirely. If I loosen the nut back, it immediately becomes free again.
It seems like the axial pre-load from torquing the nut is crushing the internal clearances or misaligning the components.
A few details:
The engine is an M119.
I am holding the camshaft itself by the machined flats (not holding the sprocket or the chain) while torquing the nut.
The splines look clean, and the return spring functions properly when the nut is loose.
Could this be caused by a worn or flipped internal thrust washer? Or is there a specific trick to the assembly sequence/alignment that I might be missing to prevent the piston from jamming?
Any part numbers for the internal shims/washers or diagrams would be highly appreciated.
Thank you in advance for your help!
I’m facing an issue while assembling the timing gear on my M119 engine and could really use some expert advice.
The problem is with the intake camshaft adjuster (mechanism).
Before I tighten the central nut, the internal splined piston (actuator/yoke) moves back and forth completely freely by hand. There is absolutely no binding, catching, or resistance.
However, as soon as I torque down the central nut to specification, the piston completely locks up and binds. It stops moving entirely. If I loosen the nut back, it immediately becomes free again.
It seems like the axial pre-load from torquing the nut is crushing the internal clearances or misaligning the components.
A few details:
The engine is an M119.
I am holding the camshaft itself by the machined flats (not holding the sprocket or the chain) while torquing the nut.
The splines look clean, and the return spring functions properly when the nut is loose.
Could this be caused by a worn or flipped internal thrust washer? Or is there a specific trick to the assembly sequence/alignment that I might be missing to prevent the piston from jamming?
Any part numbers for the internal shims/washers or diagrams would be highly appreciated.
Thank you in advance for your help!
