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Timing chain failure may call for engine replacement or a costly repair. The most seriously affected units which require the most extensive repairs were produced from 01.03.2007 to 05.01.2009. [4] However, there have been reports of timing chain failure in BMW diesel engines manufactured until 2015.
Furthermore, in engines where the timing belt drives the water pump, failure of the water pump can cause the pump to seize, which can break the timing belt or chain. For this reason, timing belts and chains are often sold as part of a kit with the water pump, tensioner, and idler pulleys so that these parts can be replaced to prevent timing ...
Work Completed: Replaced the steering box, fitted a new windscreen, replaced and repainted the offside front wing, new fuse for sunroof motor, replaced the windscreen wipers, replaced the front bumper irons and serviced the engine (including replacing the fan belt, adjusting the timing, replacing the automatic transmission fluid and replacing ...
Valvetronic system of the BMW N52 engine. The Valvetronic system is a BMW variable valve lift system [1] which, in combination with VANOS, allows infinite adjustment of the intake valve timing and lift. [2] [3] The system claims to improve fuel economy and emissions, and negates the need for a throttle body in regular use. [4]
[48] The Truth About Cars similarly named the Citation as one of the major "deadly sins" that led to GM's downfall; "Typical for GM, the Citation looked best on paper, or to the automotive writers who were suckered when they drive the most unproduction-like 'ringers' ever hand-assembled and wrote breathless reports on the Citation's spectacular ...
The ECU can constantly adjust valve timing, height, and fuel/air mixtures to optimize efficiency for a given RPM/torque load. It can sense when there is a high amount of NOx and SOx emission and change the timing to make the exhaust gas hotter or cooler. Since the engine is run electronically and not mechanically, camless engines can be updated ...
Variable valve timing (VVT) is the process of altering the timing of a valve lift event in an internal combustion engine, and is often used to improve performance, fuel economy or emissions. It is increasingly being used in combination with variable valve lift systems.
A cylinder head of a four valve Nissan VQ engine engine. A multi-valve or multivalve engine is one where each cylinder has more than two valves (an intake, and an exhaust).A multi-valve engine has better breathing, and with more smaller valves (having less mass in motion) may be able to operate at higher revolutions per minute (RPM) than a two-valve engine, delivering more power.