![]() ![]() The 5.7 Hemi engine has aluminum cross-flow cylinder heads with two valves and two spark plugs per cylinder. The timing chain is relatively long, as the camshaft is intentionally raised to reduce the length of the pushers (lighter parts mean less inertia). The chain-driven camshaft is located between cylinder banks. After the revision in 2009, pistons were equipped with narrow piston rings - 1.20/1.20/2.0 mm ring pack. Up through 2008, pistons had wider rings - 1.50/1.50/3.0 mm rings. It uses powdered metal connecting forged rods and lightweight aluminum, skirt-coated pistons. The crankshaft made of cast nodular iron is supported by four bolts per main bearing. ![]() Like the 4.7L PowerTech V8, the 345 Hemi engine has a cast-iron cylinder block with a deep-skirt design and a 90-degree angle between cylinder banks. The 5.7L power unit was a completely new engine designed from scratch. ![]()
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