Recently I notice my 944 is burning oil. It's serious when it is just started, then when the temperature comes up, it's got a little better. But from the last oil change, the oil consumption is not that serious. I am thinking of rebuilding this engine. Who can tell me roughly how much money is need to rebuild this engine. Please tell me the amount for the parts only, and the amount for the labor cuz I am thinking of doing it myself but dunno if it worth the time..