So I have a serious question about this YD25 Engine, which is both in the D22 Frontier & D40 Navara.
Everyone keeps running from the YD25 engine, everyone you ask, they say the YD25 engine is the most troublesome of all Nissan Diesel Engines.
I'm doing a rebuilt on my YD25, but everyone's advice is to switch out and replace with a TD27 or a QD32. I did alot of reading and research, and can garantee that these engines are bosses in it's class. Switching to one of these engines in my D22 definitely is a good move. Unfortunately the cost is indeed hefty.
But my question is why isn't anyone willing to learn about the engineering of the YD25 engine. When the D40 Navaras reach there age limit for an engine change would owmers also be told to replace with a TD27 or QD32?
I think that would definitely be degrading all that the Navara was build for, droping it's standard, performance & resale value.
Eventually someone's going to have to learn about the mechanics of these YD25 engines, and how to rebuild.
For now i guess it looks like owners will have to replace.