Although I moved on from my old 97 FZJ80, I retain a lot of respect for and interest in the platform, especially the last of the big inline-six motors: the venerable 1FZ.
However, nothing is impervious to decades of use, abuse, and neglect. Mine was still purring like a kitten at 233k. It did leak some oil but. I had replaced the coolant hoses, which are a common point of failure which can lead to overheating.
Anyway, I'm curious how these robust engines usually meet their demise in the real world. Do people simply neglect leaks and run them severely low on oil and coolant? Does the composite head-gasket material itself fail, or does the long Al/Fe head-block interface warp over time with many heat cycles?
Or if no catastrophic failure occurs, do they simply gradually lose PSI until they are at 500k unopened, but consuming a quart of oil a day and delivering less than 100 HP to the wheels, and a rebuild is al but necessary?
I know I'm just throwing various scenarios out there and every truck is different, depending on how it's driven, what maintenance is done or not done, etc. But I'd still be curious what those have observed whom have seen and worked on a lot of these engines.
In other words, what will usually fail first, and were these addressed or improved upon in later LC engines like the coil-pack 1FZ and the 2UZ-FE? Is the 1FZ-FE still the standard for durability and reliability?
I'd appreciate any insights. Thanks for reading.
However, nothing is impervious to decades of use, abuse, and neglect. Mine was still purring like a kitten at 233k. It did leak some oil but. I had replaced the coolant hoses, which are a common point of failure which can lead to overheating.
Anyway, I'm curious how these robust engines usually meet their demise in the real world. Do people simply neglect leaks and run them severely low on oil and coolant? Does the composite head-gasket material itself fail, or does the long Al/Fe head-block interface warp over time with many heat cycles?
Or if no catastrophic failure occurs, do they simply gradually lose PSI until they are at 500k unopened, but consuming a quart of oil a day and delivering less than 100 HP to the wheels, and a rebuild is al but necessary?
I know I'm just throwing various scenarios out there and every truck is different, depending on how it's driven, what maintenance is done or not done, etc. But I'd still be curious what those have observed whom have seen and worked on a lot of these engines.
In other words, what will usually fail first, and were these addressed or improved upon in later LC engines like the coil-pack 1FZ and the 2UZ-FE? Is the 1FZ-FE still the standard for durability and reliability?
I'd appreciate any insights. Thanks for reading.