Quote Originally Posted by wbute View Post
It will miss with a stuck or burnt out valve.
Nope, not always (but I do understand your reasoning), but it will pop through the exhaust with a burnt exhaust valve or seat (badly recessed). I've seen a burnt and split exhaust valve in a low comp 308 run almost as smooth as silk yet pop like crazy out of the exhaust. As I pointed out my own 308 had a riding valve that wasn't quite closing properly a few weeks ago (after sitting for quite some time). The guides had been done 10-12,000km ago (which equates to about 7 years ago the way I was using the ute). It freed up with a gentle persuasion and getting the engine up to temp, but I was getting close to pulling the heads off again....