Tightening Specifications

Crankshaft Main Bearing Cap Bolts

Bolt Outer Diameter Inspection





- Measure outer diameters (A), (B) at two positions.

c 20 mm (0.79 in)
d 55 mm (2.17 in)
e 12 mm (0.47 in)

- If reduction appears in (A) range, regard it (B).

Limit [(B) - (A)] 0.15 mm (0.0059 in)

- If it exceeds the limit (large difference in dimensions), replace main bearing cap bolts with new one.

Sub Bolt Outer Diameter Inspection





- Measure outer diameters (A), (B) at two positions.

c 20 mm (0.79 in)
d 15 mm (0.59 in)
e 9 mm (0.35 in)

- If reduction appears in (A) range, regard it (B).

Limit [(B) - (A)] 0.10 mm (0.0039 in)

- If it exceeds the limit (large difference in dimensions), replace main bearing cap sub bolts with new one.


Tightening Sequence





First pass Temporarily tighten bolts 1-30 in order
Second pass: Cap Bolts (M12) 1-10 39.2 N-m (4.0 kg-m, 29 ft-lb)
Third pass: Cap Sub Bolts (M9) 11-20 29.4 N-m (3.0 kg-m, 22 ft-lb)
Fourth pass: Cap Bolts (M12) 1-10 Tighten 40°
Fifth pass: Cap Sub Bolts (M9) 11-20 Tighten 30°
Final pass: Side Bolts (M10) 21-30 49.0 N-m (5.0 kg-m, 36 ft-lb)