Measurement

NOTE: Numbers in parentheses ( ) indicate a component or tool in the associated illustration.

CRANKSHAFT RADIAL BEARINGS
1. Install crankshaft bearing caps.





NOTE:
^ The crankshaft bearing caps are inserted into the side of the crankcase with an interference fit.
^ The interference fit is off-centered 0.5 mm so that the bearing caps can only be installed in one position.
^ If they are correctly installed, the lug (arrow) on the crankshaft bearing cap is pointing to the left (intake side) when looking in the direction of travel.
^ The crankshaft bearing caps are machined together with the crankcase and must not be mixed up.





2. Measure crankshaft bearing bore at two levels in the directions A, B and C (concentricity).

NOTE: If the measurement obtained for the crankshaft bearing bore exceeds the specification or if the bearing bore is out of roundness, dress the contact surface of the bearing cap on a dressing plate up to max. 0.02 mm.





3. Measure crankshaft bearing bore in direction A, note the measurement.

Example: 62.51 mm

4. Take off crankshaft bearing caps.





5. Measure crankshaft bearing journal diameter.

Example: 57.95 mm

6. Calculate thickness of bearing shell

Example:

Bearing bore diameter minus bearing journal diameter minus desired bearing play (From Specifications) equals total bearing thickness divided by two equals thickness of each bearing shell.

Bearing bore: 62.51 mm
Bearing journal: - 57.95 mm ______
Equals: 4.55 mm
Radial play desired: - 0.04 mm ______
Bearing shell:
Total thickness: 4.51 mm
Divided in half: ÷2 ______
Equals: 2.255 mm

7. Match the bearing shells.

Example:

Bearing shell thickness 2.255 mm
Refer to "Bearing Fit Tables" below.
Top bearing shell "blue"
Bottom bearing shell "blue"

NOTE: If the thickness of the bearing shells differs, install the thicker bearing shell in the bearing cap

CRANKSHAFT AXIAL (END PLAY) BEARINGS
1. Measure width of fit bearing at crankcase and at fit bearing cap and note.





2. Measure width of fit bearing at crankshaft and note.
3. Determine thickness of thrust washer.

CAUTION: Thrust washers of the same thickness must always be inserted on one side in the crankcase and in the fit bearing cap.





4. Install thrust washers.
- The oil groove must face towards the contact surface of the crankshaft and be oiled.
- The anti-twist lock is on the thrust washer in the bearing cap.





5. Measure axial bearing plait and adjust to correct size, if necessary.