WM 244619 Removing and installing DFI intake-air distributor Technical values Zoom S ized for Print Preliminary work 1. Remove both oil mist separators. -> 105519 Removing and installing oil mist separator on 4.8 l DFI engines - section on "Removing" See: Powertrain Management\Emission Control Systems\Oil Separator\Service and Repair 2. Loosen intake manifold on throttle housing. For details, see -> 243519 Removing and installing air box for throttle housing on DFI engines (intake pipes upstream of throttle valve) - section on "Removing" See: Powertrain Management\Fuel Delivery and Air Induction\Intake Air Duct\Service and Repair Information Component overview
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WM 244619 Removing and installing DFI intake-air distributor Technical values
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Preliminary work
1. Remove both oil mist separators. -> 105519 Removing and installing oil mist separator on 4.8 l DFI engines - section on "Removing" See: Powertrain Management\Emission Control Systems\Oil
Separator\Service and Repair 2. Loosen intake manifold on throttle housing. For details, see -> 243519 Removing and installing
air box for throttle housing on DFI engines (intake pipes upstream of throttle valve) - section on "Removing" See: Powertrain Management\Fuel Delivery and Air Induction\Intake Air Duct\Service and Repair
1. Loosen connections on the intake-air distributor.
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Front connections on intake-air distributor on V8 naturally aspirated engine
1.1. Disconnect cable plug for heat socket. -1-
1.2. Disconnect positive crankcase ventilation connection on heat socket. -2-
1.3. Disconnect cable plug for throttle housing and remove it from the sheetmetal clip. -3-
1.4. Disconnect cable connection for tank vent line on the intake-air distributor. -4-
2. Unclip rear tank vent line at the wire harness. -arrow-
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Tank vent line
3. Loosen screws on intake-air distributor. Illustration shows tightening sequence => Tightening sequence for intake-air distributor (shown on naturally aspirated engine) applies to both naturally aspirated and turbo engines. Carefully bend line for tank ventilation out of the way in order to access the screws.
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Tightening sequence for intake-air distributor (shown on naturally aspirated engine) applies to both naturally aspirated and turbo engines
4. Carefully lift the rear intake-air distributor at the shift gate and pull off the vacuum line under the control valve -1- (difficult to reach, use a mirror). Pull off cable plug for control valve. -2-
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Control valve
5. Lift off intake-air distributor.V8 turbo engine M48/51: 6. Loosen connections on intake-air distributor on the turbo engine in the same way as on the
naturally aspirated engine. -1, 2, 3 and 4-
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Connections on turbo intake module
7. Unclip rear tank vent line at the wire harness. -arrow-
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Tank vent line
8. Loosen screws on intake-air distributor. Illustration shows tightening sequence => Tightening sequence for intake-air distributor (shown on naturally aspirated engine) applies to both naturally aspirated and turbo engines. Carefully bend line for tank ventilation out of the way in order to access the screws.
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Tightening sequence for intake-air distributor (shown on naturally aspirated engine) applies to both naturally aspirated and turbo engines
1. Replace intake-air distributor gaskets. 2. Move intake-air distributor into installation position. Make sure that the gaskets do not slip out of
place and that the lines are not trapped. 3. Carefully lift the rear intake-air distributor at the shift gate and connect the vacuum line under the
control valve -1- (difficult to reach, use a mirror). Connect cable plug for control valve. -2-
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Control valve Information If screws are damaged, take the intake-air distributor off again and carefully tap out the affected screws with a plastic hammer. Carefully tap in new screw elements with a plastic hammer.
4. Carefully screw in screws on intake-air distributor. Screws must all fit easily. Illustration shows tightening sequence => Tightening sequence for intake-air distributor (shown on naturally aspirated engine) applies to both naturally aspirated and turbo engines. Carefully bend line for tank ventilation out of the way in order to access the screws. Align intake-air distributor with screws tightened slightly and then tighten screws according to the tightening sequence. => Tightening torque: 15 Nm (11 ftlb.)
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Tightening sequence for intake-air distributor (shown on naturally aspirated engine) applies to both naturally aspirated and turbo engines
5. Clip in rear tank vent line at the wire harness. -arrow-
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Tank vent line
6. Fit connections on the intake-air distributor.
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Front connections on intake-air distributor on V8 naturally aspirated engine
6.1. Connect cable plug for heat socket. -1-
6.2. Connect positive crankcase ventilation connection on heat socket. -2-
6.3. Connect cable plug for throttle housing and secure in sheetmetal clip. -3-
6.4. Connect cable connection for tank vent line on the intake-air distributor connection piece. -4- V8 turbo engine M48/51:
7. Replace intake-air distributor gaskets. 8. Move intake-air distributor into installation position. Make sure that the gaskets do not slip out of
place and that the lines are not trapped. 9. Fit vacuum line. -vacuum line-
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Vacuum line Information If screws are damaged, take the intake-air distributor off again and carefully tap out the affected screws with a plastic hammer. Carefully tap in new screw elements with a plastic hammer.
10. Carefully screw in screws on intake-air distributor. Screws must all fit easily. Illustration shows tightening sequence => Tightening sequence for intake-air distributor (shown on naturally aspirated engine) applies to both naturally aspirated and turbo engines. Carefully bend line for tank ventilation out of the way in order to access the screws. Align intake-air distributor with screws tightened slightly and then tighten screws according to the tightening sequence. => Tightening torque: 15 Nm (11 ftlb.)
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Tightening sequence for intake-air distributor (shown on naturally aspirated engine) applies to both naturally aspirated and turbo engines
11. Clip in rear tank vent line at the wire harness. -arrow-
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Tank vent line
12. Fit connections on intake-air distributor on the turbo engine in the same way as on the naturally aspirated engine. -1, 2, 3 and 4-
