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A rocker cover, (UK), or valve cover (elsewhere) is a cover that encloses the rocker arm in an internal combustion engine, bolting with a gasket seal to the engine head. Engines with more than one head (such as a V8 ) will have multiple rocker covers.
The facelift model of the Audi A4 was released in 2012 for the 2013 model year. It features redesigned LED headlamps and taillights, front air dam with fog lamps, and closely set twin exhausts. Interior changes include Bluetooth connectivity for audio streaming (nav equipped models only) and a redesigned ignition key.
An all-new engine designed by AUDI AGs high-performance subsidiary Audi Sport GmbH (formerly quattro GmbH), harking back to the original turbocharged five cylinder Audi engines in the "Ur-" Audi Quattro of the 1980s.
The Audi A4 DTM is powered by a 4.0 L (244 cu in) Audi naturally-aspirated V8 engine in partnership with Neil Brown Engineering for development, building, assembly, maintenance and tune-up role, it has a power output of approximately 460 hp (343 kW; 466 PS) and a maximum torque of more than 500 N⋅m (369 lbf⋅ft). [62] [63] [64]
The 3.0-litre TFSI Supercharged (TFSI) V6 engine is shared with the Audi S5 Cabriolet (though the 7-speed S Tronic is the sole transmission) and the 2013 Audi S5 Coupe. The 2012–2015 Audi A4 3.0 TFSI quattro has a lower-output version of this engine making 272 PS (200 kW; 268 hp) @4780-6500 and 400 N⋅m (295 lb⋅ft) @2150–4780.
A leak in the head gasket - often called a "blown head gasket" - can result in a leak of coolant, the combustion gasses, or both. Blue smoke from the exhaust suggests that excess oil is entering the combustion chambers (although there are other possible causes than a head gasket leak). White smoke from the exhaust suggests that coolant is ...
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