Cylinder Block - Inspection (Cont'd): Main Bearing Selection / Connecting Rod Bearing Clearance

EM-241spec table

Main bearing identification colors and connecting rod bearing tightening torques differ between CD17 and CD20. CD17 uses non-selective rod bearings; CD20 uses selective rod bearings.

Continued from EM-240

Inspection (Cont'd)

If crankshaft main journal is worn or shows any abnormality, regrind crank journal and use undersized bearings to maintain the specified oil clearance.

IMPORTANT

Refer to S.D.S. for regrinding crankshaft journal diameter and available service parts. When regrinding crankshaft journal, do not grind fillet-roll.

If either bearing, crankshaft or cylinder block is replaced with a new one, select main bearing according to the following table. These numbers are punched in either Arabic or Roman numerals.

Main Bearing Grade Number Selection

Crankshaft main journal grade number	Main bearing housing grade number 0	Main bearing housing grade number 1	Main bearing housing grade number 2
0	0	1	2
1	1	2	3
2	2	3	4

Main bearing housing grade number 00

Main bearing housing grade number 11

Main bearing housing grade number 22

Main bearing housing grade number 01

Main bearing housing grade number 12

Main bearing housing grade number 23

Main bearing housing grade number 02

Main bearing housing grade number 13

Main bearing housing grade number 24

NOTE

the table header rows read 'Main bearing housing grade number' (0, 1, 2) and the body cells give the resulting 'Main bearing grade number'.

Identification color

	CD17	CD20
Grade 0	Black	Yellow
Grade 1	Brown	Green
Grade 2	Green	Brown
Grade 3	Yellow	Black
Grade 4	Blue	Blue

Grade 0

CD17Black

CD20Yellow

Grade 1

CD17Brown

CD20Green

Grade 2

CD17Green

CD20Brown

Grade 3

CD17Yellow

CD20Black

Grade 4

CD17Blue

CD20Blue

For example: Main journal grade number: 1; Crankshaft journal grade number: 2; Main bearing grade number = 1 + 2 = 3. Main bearing thickness: Refer to S.D.S.

CONNECTING ROD BEARING CLEARANCE (Big end)

CD17: Non-selective connecting rod bearing

CD20: Selective connecting rod bearing

Connecting Rod Bearing Clearance (Big end)

1
Install connecting rod bearing to connecting rod and cap.
2
Install connecting rod cap with bearing to connecting rod. Apply oil to the thread portion of bolts and seating surface of nuts. CD17 31 - 37 N·m (3.2 - 3.8 kg-m, 23 - 27 ft-lb); CD20 37 - 45 N·m (3.8 - 4.6 kg-m, 27 - 33 ft-lb).
3
Measure inside diameter "C" of bearing.
SEM507A

Specification	Value
Connecting rod cap bolts (CD17)3.2 - 3.8 kg-m, 23 - 27 ft-lb	31 - 37N·m
Connecting rod cap bolts (CD20)3.8 - 4.6 kg-m, 27 - 33 ft-lb	37 - 45N·m
Crankshaft journal fillet (maintain more than)0.0051 in	0.13mm

Connecting rod cap bolts (CD17)3.2 - 3.8 kg-m, 23 - 27 ft-lb

31 - 37N·m

Connecting rod cap bolts (CD20)3.8 - 4.6 kg-m, 27 - 33 ft-lb

37 - 45N·m

Crankshaft journal fillet (maintain more than)0.0051 in

0.13mm

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