Ive had about 4 or 5 of them I think. Only one that I had a problem with the valve seat shattered. Never had one overheated. Dad has had his from 80,000km to 450,000km and never overheated one. He missed one oil change though at around 300,000 and ran a bearing.
Currently got the 1kz version which most people think overheats even worse. Mine gets oil, filter, and anti freeze every 5,000 km and its mint. Ive also got 2 of the 3l's in a couple of my work vans, one has 400,000 and the other 360,000. One started overheating, turned out to be a crack in the thermostat housing. $135 later and shes mint. Done 8,000 kms in it the last 8 weeks.
I have seen a lot of them blow when I was a mechanic, but they were always miss treated. A guy like you will have no problems seeing things that need doing.
Chris
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