![]() The 3MZ-FE got sequential multi-point fuel injection system, which uses 12-hole fuel injectors. Valve clearance needs checking and adjustment every 60-80k miles (100,000-150,000 km). Hydraulic lifters for the intake and exhaust valves are not provided. ![]() Toyota's 3.3L MZ engines were always produced with the Variable Valve Timing - intelligence (VVT-i) on the intake side. The engine uses a timing belt to drive the exhaust camshafts only and those, in turn, rotate the intake camshafts through gears. The 3MZ engine has aluminum cylinder heads with four valves per cylinders and belt-driven double overhead camshafts. The engine kept the 83.0 mm stroke, but it has increased bore size in order to achieve its 3.3-liter displacement. The 3MZ-FE was equipped with a forged steel crankshaft with four main journals, forged connecting rods, and aluminum alloy pistons with a resin coating on the piston skirts for friction reduction. ![]() It has the press-fitted cast-iron cylinder liners as well. Like the 1MZ, the Toyota 3.3L V6 engine has an aluminum cylinder block with a 60-degree angle between cylinder banks.
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