Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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.
NO RELATED
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.