Then measure the wear. It's so easy there is no reason not to do it. And you don't have to use the anal method leather talked about. You just need to know if you have more than 5 or 6 degrees of wear. If you do, changing the chain is worthwhile. If not, you'll just spend another hundred, drop another 3 hours, invent some new curse words, and still have the smoke in the end.

I bet you'll find that your chain is fine and the real problem is either the ip timing or the injectors. If the injectors are over 150kmiles, then pull them and send them somewhere to be tested. Most major cities have someone that can do it. Look in the yellow pages under diesel injection.

240Joe