175019 Removing and installing oil guide housing
WM 175019 Removing and installing oil guide housing
Tools
Technical values
Preliminary work
1. Remove vibration balancer. -> 137619 Removing and installing vibration damper (crankshaft pulley) - section on "Removing" Service and Repair
2. Support the engine in the vehicle. -> 1001IN Supporting the engine on the body 1001IN Supporting the engine on the body
3. Remove engine carrier. To do this, remove the screws from the hydraulic mounts from below and remove them from the longitudinal member. -> 103019 Removing and installing engine carrier - section on "Removing" 103019 Removing and installing engine carrier
Engine carrier
Front axle removed completely
4. Remove oil pan. -> 175019 Removing and installing oil pan - section on "Removing" 175019 Removing and installing oil pan
5. Unclip coolant hoses from the clip on the oil/water heat exchanger. => Coolant return on oil/water heat exchanger
Coolant return on oil/water heat exchanger
6. Remove the four top screws between the timing-case cover and oil guide housing. -arrows-
Screws between timing-case cover and oil guide housing
7. Disconnect coolant supply to the oil/water heat exchanger. To do this, clamp the coolant hoses for the oil/water heat exchanger with hose clamps. For example, use hose clamp 3093 or hose clamp 3094. Pull the coolant hoses off the oil/water heat exchanger. Coolant will run out.
8. Drain engine oil. -> 170117 Changing engine oil and oil filter Removal and Replacement.
9. For PDCC: Remove fastening nuts -1- on front wire assembly -2- from the oil pan.
Removing line bracket for PDCC lines
10. On turbo engines, remove the two side oil extraction lines -5- and (bottom illustration) -8- from the oil guide housing.
Oil circuit for turbocharger, cylinders 1 to 4
Oil circuit for turbocharger, cylinders 5 to 8
11. Release electric plug connection on the oil level sensor -a- and expose the cable. Remove oil level sensor.
Oil level sensor
12. Remove cable plug and joint flange -1, 2, 3- on the oil pressure control valve.
Oil guide housing with accessories
13. Loosen ATF lines at the oil guide housing and lay them aside. -> 386219 Removing and installing line for ATF cooling - section on "Removing" Service and Repair
Information
Component information
Oil/coolant heat exchanger, oil filter
Applying sealant to oil guide housing
Oil guide housing with accessories
Removing oil guide housing
Information
- The description only applies when installed.
- If the oil guide housing is removed when the transmission is disconnected, the oil guide housing must be aligned with the aid of a dial gauge (see section on Aligning oil guide housing with a dial gauge).
- To remove the oil guide housing, it is not necessary to remove the timing case cover. If the timing case cover is removed while carrying out work later, the oil guide housing must also be removed.
Information
- The tightening specifications for the basic engine are stored centrally. -> 1001IN Tightening torques, tightening sequences, assembly overviews [1][2]Specifications. Tightening torques and assembly instructions for other assemblies (e.g. chassis, electrics, transmission or body) or for peripheral engine equipment can be found in the corresponding documents.
1. Remove the bottom two screws between the transmission and oil guide housing.
Screws between oil guide housing and transmission
2. After removing the oil guide housing, the connecting tubes (oil lines and oil pipes) between the oil pump and oil guide housing must be removed. Do not forget the side oil suction pipes on the turbo engine. See illustrations.
Oil lines on turbo engine
Oil lines on naturally aspirated engine
Oil lines, intake pipe on turbo engine
Oil lines, intake pipe on naturally aspirated engine
3. Loosen oil guide housing. To do this, unscrew the screws for the lower part of the crankcase. -6-
Oil guide housing with accessories
4. Remove bonding (sealant) between the oil guide housing and crankcase. Carefully prise off the cast lugs using a screwdriver or a soft rubber hammer if necessary.
5. Guide the oil guide housing carefully around the oil pump and remove it.
6. Remove sealing ring for the lower part of the crankcase.
7. Clean sealing faces. Brush off remaining sealant with a plastic brush and then degrease the sealing face.
Installing oil guide housing
Information
If cold or excessively low-tempered components are sealed to each other by applying sealant, leaks can occur because of condensed water forming or components distorting. Components must be uniformly at least => Temperature: 17°C.
Information
When installing the oil guide housing, make sure that it is perfectly aligned and that there is no dirt or dust between the components. Fit the oil guide housing straight. The maximum offset must be < 0.1 mm and it must not project over the crankcase. Otherwise, leaks can occur while driving.
Information
- The tightening specifications for the basic engine are stored centrally. -> 1001IN Tightening torques, tightening sequences, assembly overviews [1][2]Specifications. Tightening torques and assembly instructions for other assemblies (e.g. chassis, electrics, transmission or body) or for peripheral engine equipment can be found in the corresponding documents.
1. Clean sealing surfaces on the oil guide housing and crankcase. The sealing surfaces must be dry and free of grease.
2. Apply liquid sealant to the oil guide housing. Apply Doboseal 224N sealant using the hand-held cartridge. The contour of the bead of sealant must be as shown in the figure shown below. The sealing bead should be approx. 1.0 mm wide and high. Ensure that the bead of sealant is continuous and that there are no gaps. => Applying sealant to oil guide housing
Applying sealant to oil guide housing
3. Insert a new sealing ring into the ring groove on the lower part of the crankcase and bond it with a very small amount of grease.
4. Place the oil guide housing on the crankcase and push evenly against the transmission bell housing.
5. Screw in a fastening screw on each corner of the oil guide housing and tighten screws by hand.
Information
- If the transmission or engine is removed, the oil guide housing must be aligned using a dial gauge.
6. Then screw in all screws by hand. While doing this, push the oil guide housing towards the transmission. Also fit the two transmission screws and tighten hand-tight.
7. Beginning at the transmission flange and proceeding forwards, tighten the screws evenly and crosswise. -6- Do not forget the screws from the top to the timing-case cover. => Screws between timing-case cover and oil guide housing Observe the different tightening torques.
Screws between timing-case cover and oil guide housing
Oil guide housing with accessories
8. Tighten the bottom two screws between the transmission and oil guide housing. => see figure For details, see -> 373527 Removing and installing transmission - section on "Installing" 373527 Removing and mounting transmission
Screws between oil guide housing and transmission
9. After fitting the oil guide housing, the connecting tubes (oil lines and oil pipes) between the oil pump and oil guide housing must be fitted. On the Turbo, fit the side oil suction pipes. See illustrations.
Oil lines on turbo engine
Oil lines on naturally aspirated engine
Oil lines, intake pipe on turbo engine
Oil lines, intake pipe on naturally aspirated engine
Fitting oil guide housing using a dial gauge
Information
When installing the oil guide housing, make sure that it is perfectly aligned and that there is no dirt or dust between the components. Fit the oil guide housing straight. The maximum offset must be < 0.1 mm and it must not project over the crankcase. Otherwise, leaks can occur while driving.
Information
- The following work steps are only necessary if the transmission is disconnected at the time the oil guide housing is being installed.
Place the oil guide housing on the crankcase and fit a fastening screw on each corner.
1. Insert the dial gauge into the universal dial gauge bracket and position it so that the dial gauge has a preload of about 1 mm.
Dial gauge
2. Set dial gauge scale to 0. To do this, place the dial gauge bracket on a completely flat surface (e.g. crankcase flange) and turn the dial gauge scale until the pointer is at 0.
Dial gauge and dial gauge holder
3. Measure the offset. In order to do this, push with the bracket starting from the crankcase flange towards the oil guide housing flange (the foot of the dial gauge bracket is located on the other component like the dial gauge probe) and measure the offset. The oil guide housing must not be set back any more than 0.1 mm. Even the slightest projection must be corrected.
Measuring offset
4. Align the oil guide housing by tapping lightly with a rubber hammer.
5. Once the oil guide housing is aligned, tighten the four fastening screws. Then check the position of the oil guide housing again with the dial gauge.
Checking position of oil guide housing again
6. Tighten the remaining fastening screws. For details of tightening torques, see Installation.
Subsequent work
1. Fit joint flange and cable plug for oil pressure control valve.
2. Fit ATF lines on the oil guide housing. -> 386219 Removing and installing line for ATF cooling - section on "Installing" Service and Repair
3. Fit the oil pan. -> 175019 Removing and installing oil pan - section on "Installing" 175019 Removing and installing oil pan
4. Fit the oil level sensor, plug in electric plug connection for the oil level sensor and route the cable.
5. On turbo engines, fit the two side oil extraction lines -5- and (bottom illustration) -8- on the oil guide housing.
Oil circuit for turbocharger, cylinders 1 to 4
Oil circuit for turbocharger, cylinders 5 to 8
6. Install engine carrier. -> 103019 Removing and installing engine carrier - section on "Installing" 103019 Removing and installing engine carrier
Engine carrier
Complete front axle
7. For PDCC: Fit fastening nuts -1- securing front wire assembly -2- to the oil pan.
Line bracket for PDCC lines
8. Connect coolant supply line to the oil/water heat exchanger. Connect the coolant hoses to the oil/water heat exchanger at the same time. Remove hose clamps.
9. Clip in coolant hoses on the oil/water heat exchanger. => Coolant return line
Coolant return line
10. Fit vibration balancer. -> 137619 Removing and installing vibration damper (crankshaft pulley) - section on "Installing" Service and Repair
11. Install engine guard. -> 108019 Removing and installing engine guard - section on "Installing" 108019 Removing and installing engine guard
12. Fill in engine oil. For details, see -> 170117 Changing engine oil and oil filter Removal and Replacement.
13. Bleed and fill the cooling system. -> 193817 Draining and filling coolant (includes bleeding) Service and Repair
14. Align the front axle and bleed all open systems.
15. Carry out a check. After test-driving the vehicle, check the engine for leaks. Then check the oil level.