David Harris
Expedition Leader
Gee it over heated. You're crazy if you're going to try and trash talk a Toyota engine.
They overheat because they crack. Common weakness in the engine design. . .
I hate to burst anybody's bubble but a cracked head on a 3B is a pretty common failure. I've decapitated dozens of 3Bs and 9 out of 10 will have cracks between the valves or cracks in the precups. If you watch your temp gauge you can run them this way for years and years but one day on a long hill ( ie 4400 M in Argentina) you are going to find yourself with a problem. I've never been that high with a diesel Land Cruiser but a rig that came from the factory at least 23 years ago with 93 HP and now weighs over 2000 kg is probably going to have a bit of a struggle at that altitude and be pushing some obscene EGTs.
Shrug. Heads are still available from Toyota and the aftermarket and the new ones are high nickle for even longer life.