The iridium-tipped spark plug caps, which provided contact to the spark plugs, were integrated with the ignition coil assembly.
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AVCS The Active Valve Control System AVCS provided variable intake valve timing by rotating the intake camshaft relative to the camshaft sprocket, within a maximum range of 50 crankshaft degrees.
Cylinder head and camshafts The EZ30R engine had an aluminium cylinder head with chain-driven double overhead camshafts DOHC per cylinder bank.
During construction, the lobes were affixed to the steel pipes using a sintered metal paste; the camshafts were then baked until the paste hardened.
In addition to preventing changes in bore shape, this design cooling around the deck surface and raised the knock limit.