Crankshaft, remove and install, engine removed. S14

# Remove and install Crankshaft, engine removed. S14

Remove engine. Crankshaft can be removed with engine in car. |
Side mount stand - Remove engine mount from right side of cylinder block. Rear mount stand - Rear mount stands are not recommended due to inaccessibility to rear of crank / flywheel. Generic rear mount stands can be adjusted to hold engine on right side.
Mount engine on an appropriate stand. BMW factory stand pictured. |
Remove reinforcement plate located at the rear of the oil pan. |
Lock flywheel in place with BMW special tool 11 2 100 or by inserting a large screw driver against the ring gear teeth.
Remove nut from the crank pulley, slide off pulley evenly. Pulley fit is a very tight tolerance, it must be removed evenly or will jam. If you pry it, do so from opposite sides at the same time, this will keep it even. |
Remove the six 6mm Allen head bolts retaining pressure plate. Each bolt has a spacer on it. Don't lose these spacers. |
CAUTION: Pressure plate is located on dowels, but it may still fall off when last bolt is removed.
Remove pressure plate and clutch disc. The pressure plate is the only thing holding the clutch disc, do not drop it when removing the pressure plate. Take note of front to back orientation of clutch disc, it must be installed the same way.
Do not remove flywheel at this stage. |
Remove oil return hose from top right of upper oil pan. |
Remove the eighteen 10mm lower pan bolts. |
Remove the lower pan. |
Remove the 17mm nut securing gear to oil pump, slide gear off shaft and remove. |
Unscrew the two 13mm bolts retaining the oil pump to the cylinder block |
Remove oil pump and any shims located between pump and block. |
Remove the twenty one 10mm bolts and remove upper oil pan. |
Remove timing chain. |
Remove connecting rod bearing caps and push rod/piston assemblies up into cylinder for clearance. |
Check axial play of crank shaft by mounting a dial indicator so that it can touch the clutch face of the flywheel, then knock crank back and forth in engine with a rubber mallet.
Replace thrust bearing if axial play is out of range : 0.085 - 0.174mm (0.0033 - 0.0068") |
Remove the eight 19mm bolts securing the flywheel. Remove flywheel. |
Remove rear seal carrier 10mm (green arrows) and 13mm (blue arrows) bolts. |
Remove crankshaft bearing caps and lift out crankshaft. |

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Checking crank for run-out

Install bearing shells 1 and 5. |
Install a dial indicator gauge on the center bearing journal and measure the run-out while turning the crankshaft. Take care to not allow crank to hit hanging connecting rods.
Maximum run-out is 0.1mm (0.004") |

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Installation

Replace bearings. |
Install crank bearing caps in correct order, number 1 being at the front of the engine. Torque to specification.
Check bearing play. |
Measure axial play with crankshaft installed . Loosen thrust bearing cap (number 3). center the thrust bearing by using a plastic hammer to gently tap the front and rear of the crankshaft. Tighten thrust bearing to correct torque.
Replace connecting rod bearing shells and measure bearing play. The connecting rods and caps have numbers by the mating surfaces. These numbers must match and be on the same side. Tighten to the correct torque.

### Torques:

Main bearing caps S14 | 22.5 ± 2.5 Nm (16 ± 2 ft lbs.) | Torque angle 50 ± 3° |
Connecting rod bolts S14 | 10 Nm ( 7 ft lbs.) | 30 Nm ( 22 ft lbs.) | Torque angle 60+2°
Rear seal carrier, 6mm bolts | 9 - 11 Nm (6.5 - 8.0 ft lbs.) |  |
Rear seal carrier, 8mm bolts | 22 ± 2 Nm (16 ± 1 ft lbs.) |  |
Flywheel | 113 -130 Nm (82 - 94 ft lbs.) | Replace bolts
Oil pan & timing cover, 6mm bolts | 9 - 11 Nm (6.5 - 8.0 ft lbs.) |  |
Oil pan & timing cover, 8mm bolts | 22 ± 2 Nm (16 ± 1 ft lbs.) |  |
Oil pump gear 10mm nut | 25 - 30 Nm ( 18 - 22 ft lbs.) |  |

E30 M3 Repair Manual V2.7. Copyright ©1999-2001 Koala Motorsport & Brett Anderson