I've been fixing crap like this for years......
I'd never recommend an 4.0L explorer to anyone. They do have an uncanny ability to keep going, but if you have engine troubles it's over. Any engineer building a friggin motor that has a timing chain on the back side of the engine should have his crayons taken away immediately. Piss poor design from the timing chains to the stupid oil pan/ main bearing caps. Have replaced LOTS of radiators.
Envoy same thing. No way. GM has gone down hill a lot over the last decade (from a techs point of view). Grew up on GM and my gf's 06 g6 has made me sour. Spending time in a GM garage recently hasn't helped. But thier 3.8 was one of the best engines ever made hands down.
Myself, I drive a 4.0L Jeep Grand. One of the best motors ever built. I've driven one into the shop with a hole in the block the side of my fist. That's right, still ran. Not a speed demon, not a MPG vehicle but very reliable engine.
Toyotas - Theyre expensive. And should be. Don't break. I worked at one of if not the biggest dealership in N. Iowa and it was a Toyota Dodge strore. 6 Dodge techs, 1 Toyota. Says enough right there.
