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Guides and repair information for the 4th generation of the BMW 7 Series / E65, E66, E67, and E68 platforms.

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What is the vvt and what does it do

What is a vvt and what does it do doe it keep from starting

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Variable Valve Timing (VVT) changes the point at which the valves open depending on factors such as engine speed and load. Mainly it fine tunes the engine performance to maximize power and fuel economy. It only allows a very few degrees of adjustment though and shouldn't keep the engine from starting.

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