RS 4 Quattro Sedan V8-4.2L (BNS) (2007)
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Disconnect electrical connector - 3 - on Engine Coolant Temperature (ECT) Sensor (G62).
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Remove electrical connectors - 1 - and - 4 - from bracket at rear coolant pipe.
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Remove bolts - 1 to 4 -.
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Remove rear coolant pipe and secondary air injection combination valves.
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Remove the bolts - 1 through 8 - and then carefully remove the left cover for the timing chain from the bond.
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Remove the bolts - 1 through 8 - and then carefully remove the right cover for the timing chain from the bond.