With its heads removed, the 4.6 SOHC engine appears to be small--a smallish cross-bolted main cap block with broad decks to accommodate the huge aluminum cylinder heads. A huge, V-shaped timing chain cover hides the entire front of the block. Missing here is the oil pump, which fits around the crankshaft. Also note the central valley is dry with both the SOHC and DOHC engines. In the center of the valley is a provision for the screw-in knock sensor.