Positive Crankcase Ventilation: Service and Repair
WM 105519 Removing and installing oil mist separator on 4.8-liter DFI engines
Preliminary work
Preliminary work
1. Remove design cover of bar ignition modules and throttle valve.
Information
Component overview
Oil mist separator for positive crankcase ventilation (M48/51 turbo engine)
1 - Engine ventilation - Tightening torque: 10 Nm (7.5 ftlb.)
2 - Engine ventilation line
3 - Tank ventilation
4 - Holder - Tightening torque: 13 Nm (9.5 ftlb.)
Oil mist separator for positive crankcase ventilation (M48/01 naturally aspirated engine)
1 - Engine ventilation - Tightening torque: 10 Nm (7.5 ftlb.)
2 - Engine ventilation line
3 - Screw, M6 x 12 - Tightening torque: 10 Nm (7.5 ftlb.)
4 - Lid with seal
5 - Engine ventilation line
6 - Line
7 - Tank ventilation with holder - Tightening torque: 13 Nm (9.5 ftlb.)
Oil mist separator and gaskets on V8 S
Oben - Oil mist separator for cylinder bank 5 to 8
Unten - Oil mist separator for cylinder bank 1 to 4
1 - Flange gaskets
2 - Sealing rings on connection piece
3 - Flange gaskets
Removing oil mist separator
Removing oil mist separator
Cylinder bank 1 to 4
1. Disconnect cable connection on the connection piece for the oil mist separator -1-. Check sealing ring and replace it if necessary.
Oil mist separator for cylinder bank 1 to 4
2. Loosen both screws -2-. Screws are permanently connected. If screws are damaged, press the screws out of the oil mist separator and replace them.
3. Hold oil mist separator at the left and right and pull carefully out of the bore in the valve cover by joggling it. At the same time check the gaskets and replace them if damaged.
Cylinder bank 5 to 8
4. Disconnect cable connections to the connection piece on the oil mist separator: Naturally aspirated engine -1 and 2-, Turbo engine -arrows-. Check sealing ring and replace it if necessary.
Oil mist separator for cylinder bank 5 to 8 on V8 S
Oil mist separator for cylinder bank 5 to 8 on V8 Turbo
5. Loosen both screws -3-. Screws are permanently connected. If screws are damaged, press the screws out of the oil mist separator and replace them.
6. Hold oil mist separator at the rear and pull carefully out of the bore in the valve cover by joggling it. At the same time check the gaskets and replace them if damaged. Lift carefully, as the oil return line is still fitted.
Removing oil mist separator
Detaching oil mist separator at front
7. Detach oil return line underneath the oil mist separator at the plastic connection piece -arrow-. Loosen spring band clamp if necessary (Turbo) -arrow-.
Oil return on V8 S
Oil return on V8 Turbo
Installing oil mist separator
Installing oil mist separator
The installation procedure for cylinder banks 1 to 4 and 5 to 8 is essentially the same.
1. Check gaskets on oil mist separator and replace if damaged. -1, 2 and 3-
Oil mist separator and gaskets on V8
Oben - Oil mist separator for cylinder bank 5 to 8
Unten - Oil mist separator for cylinder bank 1 to 4
1 - Flange gaskets
2 - Sealing rings on connection pieces
3 - Flange gaskets
2. Lubricate sealing rings on connection piece on oil mist separator with grease 000.043.204.68 (Kluber Syntheso Glep 1). -3-
3. Place oil mist separator in installation position.
4. Fit oil return line underneath the oil mist separator on the plastic connection piece -arrow-. Fit spring band clamp if necessary (Turbo) -arrow-.
Oil return on V8 S
Oil return on V8 Turbo
5. Place oil mist separator uniformly and carefully onto the valve cover using both hands. Press connection piece of oil mist separator into bore in valve cover.
6. Screw in and tighten screws for oil mist separator -3-. Screws are permanently connected. If screws are damaged, press the screws out of the oil mist separator and replace them. - Tightening torque: 10 Nm (7.5 ftlb.)
7. Fit cable connections to the connection piece on the oil mist separator: Naturally aspirated engine -1 and 2-, Turbo engine -arrows-. Check sealing ring and replace it if necessary.
Oil mist separator for cylinder bank 5 to 8 on V8 S
Oil mist separator for cylinder bank 5 to 8 on V8 Turbo
Subsequent work
Subsequent work
1. Fit design cover.