4D56U High Output motor reliability??

[PajeroNewbie]

Good day

I am beginning to question the reliability of the 4D56U high output motor.

i have recently done the head on mine, 6 months ago

now i have piston knock.

my engine was replaced by Mitsubishi and it only has 100K Kilos on it, which to me to is nothing.

today i saw another Triton with the same motor in, also shot.

is there anyone else on this group that has had problems with this motor or anyone currently having issues with this motor??

Thanks
Mark