I plan on replacing my 95 M50tu timing chain tensioner spring with new spring and piston, gasket etc. with parts I just recieved from BMA. Per Bentley, it seems I just unscrew the cap, insert new parts and tighten cap to 37 ft-lbs.

Is there anything I should look out for? I did notice there is no notch in the piston end like the etk diagram and as stated in Bentley. It is smooth with a small hole in the end-no notch??

TIA