I had the same with my Hilux, though quite a bit worse. I think they were the original ones, so we're talking over 400,000 km.
Still not clear about the figures you used..
Lets assume the moment at the eye on the steering arm is 33 cm from the centre of the bearings, just for ease of mental arithmetic.
If the Haynes manual says give it 36 Nm, then you should apply 12 N on the spring balance..
Putting 36 Nm on the balance would be applying over 100 Nm of preload to the bearings.
So what did you use?? Surely you have put as least as much on this time, so not solved the issue which caused the problems... Unless of course they were not genuine Koyo bearings??
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