Part 1
WM 134819 Removing and installing crankshaft on V6 DFI engines
Tools
Technical values
Preliminary work
Information
- Dispose of fluid in accordance with legal requirements.
Information
- Press the bottom chain tensioner together during removal because otherwise it will push out due to spring tensioning. Secure chain tensioner with a tie-wrap in tensioned state.
1. Remove the engine. => 100119 Removing and installing 3.6-litre DFI engine - section on "Removing"
2. Remove the transmission. => 100127 Removing engine from transmission and mounting engine on transmission
3. Secure engine on mounting bracket. => 1001IN Supporting V6 3.6-litre DFI engine on mounting bracket
4. Remove engine carrier eyebolt at the front and rear. => 1001IN Lifting V6 3.6-litre DFI engine with a workshop crane
5. Remove the engine wire harness. => 97522100 Removing wire harness for engine (V6)
6. Remove bar ignition modules. => 282020 Removing and installing DFI bar ignition modules
7. Remove intake-air distributor. => 244619 Removing and installing DFI intake-air distributor - section on "Removing"
8. Remove drive belt. => 137819 Removing and installing drive belt on V6 DFI engines - section on "Removing"
9. Remove belt tensioner. => 137319 Removing and installing belt tensioner on DFI engines - section on "Removing"
Belt tensioner
10. Remove cylinder head cover.=> 158219 Removing and installing cylinder head cover on V6 DFI engines
11. Remove flywheel/drive plate.
11.1. Remove dual-mass flywheel on vehicles with manual transmission. => 136219 Removing and installing dual-mass flywheel - section on "Removing"
11.2. Remove drive plate on vehicles with automatic transmission. => 136319 Removing and installing drive plate for torque converter
12. Remove oil pan. => 175019 Removing and installing oil pan on V6 DFI engines - section on "Removing"
13. Remove upper and lower timing-case cover. => 153319 Removing and installing timing-case cover on V6 DFI engines - section on "Removing"
14. Position crankshaft to the compression TDC for cylinder 1. => 150502 Checking the timing on V6 DFI engines
15. Remove chain tensioner. => 153619 Removing and installing chain tensioner on V6 DFI engines - section on "Removing"
16. Remove timing chains. => 153519 Removing and installing timing chains on V6 DFI engines - section on "Removing"
17. Remove cylinder head. => 157019 Removing and installing cylinder head on V6 DFI engines - section on "Removing"
18. Remove pistons. => 131019 Removing and installing pistons on V6 DFI engines - section on "Removing"
19. Remove vibration balancer. => 137619 Removing and installing vibration balancer (crankshaft pulley) on V6 DFI engines
Brace
20. Remove joint flange behind the vibration balancer.
Crankshaft joint flange
20.1. Unscrew hexagon-head bolts -3-.
20.2. Carefully lever off the joint flange -2- with a screwdriver.
Removing crankshaft
Information
Removal of crankshaft
Before removing the crankshaft, have a suitable tray ready so that the pulse-generating wheel is not damaged as a result of excessive contact.
The engine is secured on the engine support to facilitate assembly work.
When replacing bearing shells, only use bearing shells with the same colour coding.
1. Remove the crankshaft.
Crank drive on V6 DFI engine
1.1. Prepare a clean surface for laying down the crankshaft. Make sure not to damage the drive plate for the inductive pickup (speed sender) when laying down the crankshaft.
1.2. Remove crankshaft bearing covers -1- and lay them down arranged according to cylinder.
1.3. Dispose of thrust washers -4- and crankshaft bearing shells -3-.
1.4. Remove the crankshaft and lay it down on the prepared surface.
1.5. Remove oil spray jets -8- if necessary.
Installing crankshaft
1. Install the crankshaft.
Crank drive on V6 DFI engine
1.1. Oil bearing shells with engine oil and place them on the crankshaft/crankcase.
Twist locks
1.2. Always replace bearing shells. Observe relevant classification.
1.3. Fit thrust bearing no. 5 with thrust washers -4- (insert using grease, lubricating groove facing outwards) and then fit the remaining bearing covers.
1.4. Tap crankshaft bearing covers on securely as far as they will go using a rubber hammer so that the tightening torque will be accurate.
1.5. Internal serration screws on the crankshaft bearing covers -2- must always be replaced and screwed in by hand.
1.6. Then gradually tighten the bearing covers from the inside out to the specified torque -2-.
1.7. As a test, turn the crankshaft several times to check that it turns smoothly.
Replacing speed sender wheel
Replacing speed sender wheel
1. If the drive plate -6- for the inductive pickup (speed sender) was removed from the crankshaft, it must always be replaced. The drive plate must never be reused.
Crank drive on V6 DFI engine
2. Tighten the countersunk screws -7- on the drive plate to the specified tightening torque.
Subsequent work
CAUTION
Leaks due to components being at too low a temperature or at different temperatures.
- If components that are cold or at different temperatures are sealed together by the application of sealant, adhesion problems and leaks can arise due to the build-up of condensation water or component distortion.
-> Components must have reached at least 17°C throughout.
-> Components must not be too hot (distortion).
-> Spare parts that are stored in the cold or heat (strong sunlight), must be brought to room temperature or the same temperature as other parts before installation.
Information
- Detailed instructions for installing pistons must be observed at all times.
- The cast lugs, the twist lock (locking lugs) -1- and the flat side of the piston crown -2- are on the same side.
Arrangement of pistons and connecting rods
1. Install pistons. => 131019 Removing and installing pistons on V6 DFI engines
Overview of piston/connecting rod
1.1. Pull dowel sleeve -arrow- out of the bore hole so that special tool funnel T10333 can be positioned flat on the cylinder block.
Dowel sleeve on cylinder block
