Video Porsche 996 C4 Complete Engine Rebuild Complete engine rebuild of a Porsche 996 C4 with piston slap. The pistons, cylinder sleeves, IMS bearing, AOS, water pump, coolant hoses and more were all replaced during the build. Advertisement ByEngine Builder on Sep 21, 2015 AdvertisementClick Here to Read MoreAdvertisement Advertisement In this article:Engine Rebuild, porsche 996 c4 Loading Post... Loading Post... Loading Post... Advertisement VIDEOS Watch Engine Builder's latest discussions and explanations. SHOP Shop the latest Engine Builder merchandise. SUBSCRIBE Stay up to date by signing up for the Engine Builder newsletter.