There was no "technical update" (TU) version of the M54 produced, therefore the engine specifications remained the same throughout its seven-year production run. Variable valve timing is fitted to both camshafts (called " double-VANOS"), a dual length intake manifold (called "DISA") is used and the thermostat is electronically controlled. ![]() The displacement of the largest variant increased from 2.8 L to 3.0 L (2,979 cc), due to an increase in stroke to 89.6 mm (3.53 in).Īs per the M52TU, the M54 uses an aluminium block and aluminium cylinder head with cast iron cylinder liners. Compared with the final versions of its M52 predecessor (called the 'M52TU'), the M54 has a non-return fuel system, a fully electronic throttle (without mechanical backup), Siemens MS 43 engine management, a revised intake manifold.
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