Reply to thread

Message: <blockquote data-quote="daneast" data-source="post: 20897" data-attributes="member: 6666"><p>I'm going to be pulling this engine and replacing the pistons and rings. In our case, the problem was directly the rings. We were burning a quart of oil every 300 miles with 70k on the engine, due to the #3 piston, for the last 8-9k miles. All my checks showed the PCV was not clogged up and we had good vacuum through the intake manifold. I believe what happened is the PCV orifice froze up in the 10F degree weather, and that crank pressure blew out the already compromised rings on #3. I guess in some way that might be better, because that is where the pressure relieved itself instead of blowing out the main seal in the rear.  After new pistons and rings (supposedly the after market pistons address the poor ring design by GM), and perhaps one of the PCV modifications, the vehicle should be good for a long time.</p></blockquote><p></p>