Is this true? I've missed this if it's true.
Sorry, I described the issue incorrectly. It is leaking head gaskets on the V6. I don't know how common it is, but it has been reported here by a number of folks:
http://www.toyota-4runner.org/4th-g...sket-issue-2004-4runner-v6-thousand-time.html
http://www.toyota-4runner.org/4th-gen-t4rs/73706-2004-limited-edition-4runner-4x4-head-gasket.html
http://www.toyota-4runner.org/4th-gen-t4rs/121733-blown-head-gasket-repair-advice-please.html
I know the early V8's are prone to exhaust manifold leaks.
I have heard that if the V8 exhaust manifold cracks that the repair is very expensive. That said, I've seen few posts about that.