</font><blockquote><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><hr /><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans"> PS, on these boards, 4 cylinders are lucky to hit 150K before major work when pulling big tires, etc... I have never, ever seen a signature or claim of a 4 cylinder engine surving over 300,000 miles (let alone 400,000) in a 4 wheel drive lifted big tire truck. </font><hr /></blockquote><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">I believe you just hit on the real determining factor here. "...in a 4 wheel drive lifted big tire truck..." Keep in mind that none of these engines, hell, these trucks, were designed with the idea of people running them with huge tires and stock gears (either because they can't afford to, or just don't want to re-gear), or even in any application besides stock at all. While it may have crossed the engineer's minds, it was by no means the sole determining factor in the designs of the engines. While all three engines being discussed here are excellent engines, I think this is where the 22R might edge out the other two just slightly in terms of reliability.

I think no one here will disagree that in off road useage, it is very common to thrash the hell out of your truck and it's motor. Either by running huge tires with less than ideal gearing on the highway to get where you are going, or by using insanely low gearing to take it places most people would call you insane to even think of, you are putting stresses on it that it was never designed for. Now then I ask you this: which motor has held up better to this kind of abuse? I have been reading and posting to this board for a year or two now, and have been interested in yotas for far longer, and it seems to me that the 22R has been the engine that has held up the best. Among my friends we have a saying: "Toyotas last forever if you take care of them; half of that if you don't."

Another way to look at it:
Take a look at the reliability and longevity of the engines that have been kept in stock applications. That's where I suspect you will find the engines with 300,000+ miles with no rebuild. And I suspect a lot of that has to do with simple math. The 22R has fewer parts - less stuff to break and go wrong. I'm not saying the 3VZE and 5VZFE are bad, far from it. They are very reliable, the 22R is just more so.

As for power, well, there is just no contest there. The 3.4 kicks both other engine's asses combined with two dead cyls <img border="0" title="" alt="[Smile]" src="images/icons/smile.gif" /> .

I'm not trying to re-start the "which engine is better" debate, just pointing out that they all have their strengths and weaknesses. When looking at reliability, the 4 banger comes out slightly ahead of the sixes. Just as the sixes beat the 4 like a drum when it comes to power.

Bottom line: they are all Toyota, they will all last forever if you take care of them, half of that if you dont <img border="0" title="" alt="[Big Grin]" src="images/icons/grin.gif" /> .

P.S. I second the motion that the 4 is nicer to work on!