I own a 2000 4X2 Hilux (LN145 - 2.4D) and recently heard a knock coming from about the 3rd cylinder. Took off the cam cover and can see nothing to generate this sound - which comes in at about 4000 RPM or so.
I see that this engine uses hydraulic lifters and was wondering if anybody out there experienced this problem in particular. Oil level is good and the van isn't driven recklessly so I don't believe it to be piston or crank or connecting rod noise. It sounds like it is coming from the head itself.
Any ideas will be greatly appreciated here!
Tanx