[Bsktball55]

I had a 4 cylinder in a '91 4runner and had to have the engine replaced at 121,000, partly because of a timing chain being installed wrong. We had a rebuilt engine put in and it blew again around 180,000. I've always felt that given the same quality of all the parts, meaning in a bigger engine there are more parts that could possibly fail, that a larger engine should last a lot longer than a smaller one. For ex. In my 4runner when I was cruising down the high way around 75mph the tach would be reading almost 4,000 rpms. In my '05 tacoma when I am going 70-75 the tach shows between 2000-2500 rpms. To me that means that 4 cylinder is working twice as hard and getting twice the wear and tear that the V6 is getting.