Engine, Installing
Tightening Specifications
Tightening specifications only apply to lightly greased, oiled, phosphated or blackened nuts and bolts.
Additional lubricants, such as engine or transmission oil are permissible, although lubricants containing graphite are not.
Do not use any degreased parts.
Tolerance for tightening specifications ±15%.
Tightening specifications, refer to SUBFRAME ASSEMBLY OVERVIEW .
Additional tightening specifications
| Component | Nm | ||
|---|---|---|---|
| Bolts and nuts | M6 | 10 | |
| M7 | 15 | ||
| M8 | 20 | ||
| M10 | 40 | ||
| M12 | 65 | ||
| Exceptions: | |||
| Driveshaft heat shield to the cylinder block | 35 | ||
| Front underbody crossmember to the body | 23 | ||
Mounting, S-tronic transmission to engine
| Item | Bolt | Nm |
|---|---|---|
| 1, 3, 10 | M12x55 | 80 |
| 5 | M12x65 | 80 |
| 6, 7, 8 | M10x50 | 40 |
| 9 | M12x70 | 80 |
| 2, 4 | Starter, securing. Refer to REMOVAL AND INSTALLATION | |
| A | Alignment sleeves for centering | |
Installation is in reverse order of removal, note the following:
- The engine/transmission subassembly is attached to the engine bracket T10012.
Replace bolts which have been tightened to an additional torque.
Replace self-locking nuts and bolts as well as sealing rings, seals and O-rings.
The hose connections as well as the air guide pipes and hoses must be free of oil and grease before installing.
Secure all hose connections with hose clamps appropriate for the model.
In order to be able to securely mount the air guide hoses on their connectors, spray the bolts on the previously used clamps with a rust remover.
During installation, all cable ties must be installed at the same location.
-- Make sure the intermediate plate is engaged on the sealing flange and slide onto the guide sleeves -arrows-.
-- If the alignment sleeves -A- for centering the engine and transmission are missing inside the cylinder block, then install the sleeves.
-- If a needle bearing is installed in crankshaft, remove needle bearing. Refer to NEEDLE BEARING ON CRANKSHAFT .
-- Lightly lubricate transmission input shaft splines with clutch disc connection lubricating grease.
-- Check clutch drive plate centering.
-- If the alignment sleeves -A- for centering the engine and transmission are missing inside the cylinder block, then install the sleeves.
-- If no needle bearing is installed in crankshaft, install needle bearing. Refer to NEEDLE BEARING ON CRANKSHAFT .
-- Tighten the transmission to the engine.
-- Guide the engine/transmission subassembly into the body.
-- Install the bolts -arrows- for the subframe mount on the engine side first by hand all the way.
-- Install the bolts -arrows- for the subframe mount on the transmission side first by hand all the way.
The bolts are first tightened to final torque after the subframe mount has been adjusted. Refer to SUBFRAME MOUNT, ADJUSTING .
-- Remove engine bracket T10012 from engine.
-- Install the starter. Refer to STARTER - ENGINE CODE(S): CBEA .
-- Install the EGR cooler pump -V400-. Refer to COOLANT PIPES, COOLANT TEMPERATURE SENSORS AND COOLANT PUMP ASSEMBLY OVERVIEW .
-- Install the air guide pipe. Refer to CHARGE AIR COOLER ASSEMBLY OVERVIEW .
-- Install and adjusts the selector lever cable. Refer to REMOVAL AND INSTALLATION .
-- Install the particulate filter. Refer to PARTICULATE FILTER .
-- Install the drive axles, the transverse links and the coupling rods. Refer to Removal and Installation .
-- Install A/C compressor. Refer to Removal and Installation .
-- Install the ribbed belt. Refer to:
- RIBBED BELT, VEHICLES WITH TENSIONING DAMPER AND A/C COMPRESSOR
- RIBBED BELT, VEHICLES WITH TENSIONING ROLLER AND A/C COMPRESSOR
- RIBBED BELT, VEHICLES WITHOUT A/C COMPRESSOR
-- Install the front section of the wheel housing liner. Refer to Removal and Installation .
-- Install the front wheels. Refer to REMOVAL AND INSTALLATION .
-- Install Engine Control Module (ECM). Refer to Removal and Installation .
-- Install the radiator. Refer to RADIATOR .
-- Connect the coolant hoses to the heat exchanger RADIATOR AND COOLANT FAN ASSEMBLY OVERVIEW .
-- Install the auxiliary fuel pump -V393-. Refer to AUXILIARY FUEL PUMP .
-- Install exhaust pressure sensor 1 -G450-. Refer to Removal and Installation .
-- Install the filler tube and the windshield wiper fluid reservoir filler tube. Refer to REMOVAL AND INSTALLATION .
-- Install the air guide hose with the connector coupling CHARGE AIR COOLER ASSEMBLY OVERVIEW .
-- Adjust subframe mount. Refer to SUBFRAME MOUNT, ADJUSTING .
-- Electrical connections and routing Refer to appropriate SYSTEMS WIRING DIAGRAM.
-- Install the battery tray and the battery. Refer to REMOVAL AND INSTALLATION .
-- Install and adjust the windshield wiper arms. Refer to REMOVAL AND INSTALLATION .
-- Install air filter housing. Refer to Removal and Installation .
-- Check oil level. Refer to 03 MAINTENANCE, DIAGNOSIS
Risk of destroying control modules with excess voltage.
- Do not use a battery charger for starting assistance!
-- Fill with coolant COOLING SYSTEM, DRAINING AND FILLING => Filling .
Only reuse drained coolant if cylinder head or engine block was not replaced.
Dirty coolant may not be used again.
-- Install the noise insulation. Refer to Removal and Installation .