Volvo Penta 230 Workshop Manual page 16

Crankshaft
Crankshaft, axial clearance .................................................................
Main bearing, radial clearance .............................................................
Crank bearing, radial clearance ..........................................................
Straightness, maximum deviation ........................................................
Main bearings
Main bearing journals
Out of roundness, max. .......................................................................
Taper, max. ..........................................................................................
Standard diameter ...............................................................................
0.25 mm undersize (0,0098") ..............................................................
0.50 mm undersize (0,0197") ..............................................................
Seat width on crankshaft for thrust bearings
Standard ..............................................................................................
Oversize 1 ...........................................................................................
Oversize 2 ...........................................................................................
The main bearings are available in two makes. The upper and lower
main bearing shell on the same pivot must be of the same make.
In production matched crankshaft bearing shells are used. The
bearing shells are color coded, red, yellow and blue. They are matched
in accordance with one of the following alternatives:
Alternative 1: Two yellow-marked bearing shells.
Alternative 2: One blue-marked and one red-marked bearing shell. The
blue-marked shell to be located on the crankshaft and the red-marked
shell in the bearing cap.
NOTE! Only yellow-marked bearing shells are available for spare parts
purposes.
Connecting rods
Connecting Rod Bearings
Bearing journals
Out of roundness, max. .......................................................................
Taper, max. ..........................................................................................
Bearing seat width ...............................................................................
Standard diameter ...............................................................................
0.25 mm undersize (0.0098") ..............................................................
0.50 mm undersize (0.0197") ..............................................................
Axial clearance at the piston ...............................................................
Length, center to center ......................................................................
Max. weight difference between connecting rods in the same engine .
14
AQ131A, 131B,
151A, 151B,
171A, 171B
0.080–0.270 mm
(0.0031–0.0106")
0.024–0.072 mm
(0.00094–0.00283")
0.023–0.067 mm
(0.00091–0.00264")
0.025 mm
(0.00098")
Taper
0.004 mm
(0.00016")
0.004 mm
(0.00016")
54.987–55.000 mm
(2.1648–2.1654")
54.737–54.750 mm
(2.1550–2.1555")
54.487–54.500 mm
(2.1452–2.1457")
31.96–32.00 mm
(1.2583–1.2598")
32.21–32.25 mm
(1.2681–1.2697")
32.46–32.50 mm
(1.2780–1.2795")
0.004 mm (0.00016")
0.004 mm (0.00016")
23.9–26.1 mm (0.9409–1.0276")
48.984–49.005 mm (1.9285–1.9293")
48.734–48.755 mm (1.9187–1.9195")
48.484–48.505 mm (1.9088–1.9096")
0.25–0.45 mm (0.0098–0.0177")
152 mm (5.9843")
20 grams (0.7055 oz.)
AQ131C, 131D,
151C, 151D, 171C, 171D,
230, 250, 251DOHC
0.080–0.270 mm
(0.0031–0.0106")
0.024–0.064 mm
(0.0009–0.0025")
0.023–0.067 mm
(0.00091–0.00264")
0.025 mm
(0.00098")
Out-of-roundness
0.004 mm
(0.00016")
0.004 mm
(0.00016")
62.987–63.000 mm
(2.4798–2.4803")
62.737–62.750 mm
(2.4700–2.4705")
62.487–62.500 mm
(2.4601–2.4606")
35.46–35.50 mm
(1.3961–1.3976")
–
–
Color code