BMW 5251 Service Manual page 120

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Cylinder Head Removal and Installation
4
Working at throttle housing, unscrew and disconnect electri-
cal harness plug (arrow).
4
Disconnect electrical harness connector at fuel tank venting
valve (A) and vent hose at quick disconnect fitting (arrow).
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Working under intake manifold, disconnect the following:
Engine oil dipstick tube support.
Oil separator return line from dipstick tube.
Knock sensor harness connector from support.
4
Working underneath car, remove intake manifold support
mounting nut (arrow), located adjacent to left engine mount.