Well take it too the Mechanical forum the Monaro Forum for your talk but for this problem with these Engines its a Major Issue I had Phil check my sister Calais which the Holden dealer said it was ok but Phil said no its not that bad but not good either. she took the car to the dealer and told them don't start it until Phill arrives next morning and within 2 minutes it was booked in to be rebuilt. The LS1 forum is a good forum but only the priviledged become Valadated and if you are Valadated you are allowed in the hidden Private forums and there is where the action is and its not easy to become valadated. And of course Phil is Valadated the A.R.S.E But again like Phil and other say what is quiet for you and the Holden Dealers that have been told to knock them back fails for some.<br />They all should have been replaced, Phil had a great Photo collection of the old and the new pistons and all the other mods that he had done while the motor was appart, They won't forget him in a hurry. The way I look at it as long as you have the failed pistons in the engine you will never sleep. Aren't you a friend og Phil you know he had an LS1 and was involved with cars? just because you're a mechanic by the look at it you should have asked someone else. YU4CFG, this is the second time you have stuffed up, the UBI box was the last debarkle. <img border="0" title="" alt="[Confused]" src="images/icons/default/confused.gif" /> I would have asked before buying it. Ask Phil what happenes if you ever want to trade it in. shit!!!!!!!!!!!! to long to type. <img border="0" title="" alt="[Smile]" src="images/icons/default/smile.gif" />