I would just like a consensus on what would be wrong with my original 230. The motor has 17,000 miles on it. It starts instantly and runs great for the first 3 minutes with no smoke at all not even a puff of smoke on start-up. after 3 minutes it creates a huge smoke cloud behind the truck and looking at the motor, I see oil literally boiling out of three crack in the exhaust manifold. All the smoke is coming out of the exhaust pipe though. I would think its the rings but not 100% A guy may be interested in buying all the original parts I have pulled out, so I would like to tell him how much work he's looking at.