11 21 500 

Attention!

Weight of crankshaft is approx. 25 kg.

Risk of injury from sharp edge of housing.

Necessary preliminary work:

Fully remove front axle together with engine.

Remove engine from front axle .

Mount engine on assembly stand.

Remove both cylinder heads.

Remove hub for vibration damper.

Take off oil pump.

Remove upper oil sump section Remove lower gear case cover.

Remove pistons.

Remove flywheel.

Remove radial shaft seals.

Remove timing chains.

Replacing crankshaft on on engine BMW N63O1

Installation note:

Layout of main bearing caps.

All numbers must be read from the cylinder bank (1 to 4) (see arrows).

Replacing crankshaft on on engine BMW N63O1

Main bearing caps (1 to 5) opposite the output end on the timing chain drive.

Replacing crankshaft on on engine BMW N63O1

Release main bearing taper screw mounting (1).

Release oil pump spacer bolt (2) (N63O1 only).

Release all threaded support sleeves (1).

Release collar bolts (M8) in sequence 10 to 1.

Release collar bolts (M11) in sequence 10 to 1.

Remove main bearing caps 1 to 5.

Attention!

Remove crankshaft with a 2nd person, weight approx. 25 kg.

Lift out crankshaft and set down safely (secure against turning).

Release screw for oil nozzle (1).

Tightening torque: 11 11 7 AZ:

7AZ Oil nozzle to crankcase
N63 O1 M12x1 10 Nm

Illustration: N63.

Installation note:

Check oil nozzle (1) for clear passage with compressed air.

Observe fastening on oil nozzle.

Illustration: N63.

Replace crankshaft main bearing shells.

Installation note:

Note arrangement of main bearing caps (1 to 5).

All numbers must be read from the cylinder bank (1 to 4) (see arrows).

Main bearing caps (1) is opposite the output end on the timing chain drive.

Turn back all threaded support sleeves hand-tight.

Installation note:

Coat all bearing positions with engine oil.

Attention!

Install crankshaft with a 2nd person, weight approx. 25 kg.

Install crankshaft.

Fit bearing caps 1 to 5.

Set down bearing caps positioned from 1 to 5.

Insert all collar bolts (M11) hand-tight.

Insert collar bolts (M11) in sequence (1 to 10).

Installation note:

For a better overview of the screw connection quality, mark the head of all collar bolts after joining with a line (1) using an oil-proof marker pen.

Check angle tightening.

Secure collar bolt (1) with special tool 00 9 120.

Tightening torque 11 11 1 AZ:

1AZ Bearing cap to crankcase (ASA collar bolt)
N63 O1 M11x99 Replace bolts, screw in hand-tight

Insert all collar bolts (M8) hand-tight.

Secure collar bolts (M8) in sequence (1 to 10).

Installation note:

For a better overview of the screw connection quality, mark the head of all collar bolts after joining with a line (1) using an oil-proof marker pen.

Check angle tightening.

Secure collar bolt (1) with special tool 00 9 120 .

Tightening torque: 11 11 2AZ:

2AZ Bearing cap to crankcase (ASA collar bolt 10.9)
N63 O1 M8x70 Replace screws.

Secure all threaded support sleeves (1) with special tool 11 4 350 .

Tightening torque: 11 11 3 AZ:

3AZ Threaded support sleeves
N63 O1 Jointing torque 6 Nm

Replacing crankshaft on on engine BMW N63O1

Secure main bearing taper screw mounting (1).

Tightening torque: 11 11 4 AZ:

4AZ Angled screw connection to crankcase
N63 O1 M8x37 Flanged head screw 10.9

Replacing crankshaft on on engine BMW N63O1

Check crankshaft coefficient of friction.

Determine crankshaft breakaway torque with special tool 00 2 010 .

Rotate crankshaft at central bolt using special tool 00 2 010 .

If the breakaway torque is too high, it will be necessary to correct the bearing clearance.

Replacing crankshaft on on engine BMW N63O1

Secure special tool 11 6 252 to crankcase with magnetic base.

Slide crankshaft in the direction of the arrow forwards as far as it will go.

Set special tool 11 6 251 to zero.

Slide crankshaft (1) in the direction of the arrow towards rear and determine value.

Check side clearance.

Assemble engine.

Installation note:

Modify dowel pin for flywheel.