Another way to ensure the timing belt is replaced correctly without timing pins is to before it's removal Jamb the camshft belt wheel by banging a wooden wedge behind it firmly to stop it moving then paint marks across both camshaft wheel tooth and belt valley between teeth, same with lower crankshaft toothed belt drive wheel. Once the belt is off these paint marks can be transfered to a new belt if needed. These paint marks and transfer paint marks from old to new belts need doing very accurately. If the crankshaft or camshaft moves, all the paint marks will all align up and be corrected. I often did this on many different engines when no timing pins were handy. to be safe. Afterwards always turn engine over by hand before starting it up, to be sure as valves and pistons on diesel engines only just miss each other when running, ONE tooth out and they could collide, TWO teeth out and they almost certainly will.