D 350 Pickup L6-359 5.9L DSL (1989)
Crankshaft: Service and Repair
Service Procedures
CRANKSHAFT GRINDING - GENERAL
Crankshaft main and rod journals may be reground in increments of 0.25mm [0.0098 inch] up to four times for a total of 1.00mm [0.0394 inch].
The only exception is the main journal thrust width surface which must be reground in two increments of 0.50mm [0.0197 inch] and 1.00mm
[0.0394 inch]. The thrust surface is located on the number six main bearing. When the thrust surface requires regrinding, the main journal must be
reground to the same undersize dimension.
Two procedures, a preferred and an optional, will be given for regrinding all crankshaft journals except when the thrust width surface requires
regrinding. Then the preferred procedure is the only accepted procedure.
Crankshaft Main Journal Regrind Specifications
Standard main journal size: 83.000 +/- .013mm [3.2677 +/- .0005 inch]
Worn Limit: 82.962mm [3.2662 inch]
Undersizes: All Main Journals
Available Undersize Regrind To:
0.25mm [0.0098 inch] 82.750 +/- .013mm [3.2579 +/- 0.0005 inch]
0.5Omm [0.0197 inch] 82.500 +/- .013mm [3.2480 +/- 0.0005 inch]
0.75mm [0.0295 inch] 82.250 +/- .013mm [3.2381 +/- 0.0005 inch]
1.00mm [0.0394 Inch] 82.000 +/- .013mm [3.2283 +/- 0.0005 inch]
All main journals are to be parallel to the front and rear mains within 0.03mm [0.001 inch]
Out of roundness: 0.005mm [0.0002 inch] maximum
Taper: 0.005mm [0.0002 inch] maximum
All main journals are to be ground in the opposite direction of engine rotation (clockwise as viewed from the front of crankshaft). Polish the
journals in the same direction as engine rotation.
THRUST JOURNAL/THRUST SURFACE WIDTH REGRINDING
Thrust journals can be reground in the same increments and using the same specifications as all other main journals. The main journal radius may
be reground using either the preferred or the optional procedure providing the thrust surface width is not being reground. Then the preferred
procedure must be used. When the thrust surface width requires regrinding the main journal must be reground to the same undersize dimension.
Available Undersize
Regrind To
Thrust Journal/Surface
A = Diameter
B = Width
0.50mm
82.500 +/- 0.013mm
38.000 +/- 0.025mm
[0.0197 inch]
[3.2480 +/- 0.0005 inch]
[1.4961 +/- 0.001 inch]
1.00mm
82.000 +/- 0.013mm
38.500 +/- 0.025mm]
[0.0394inch]
[3.2283 +/- 0.0005 inch]
[1.5158 +/- 0.001 inch]
The thrust surface (C) is to be ground on center within 0.10mm [0.004 inch] and must be perpendicular to the front and rear mains within
0.0015mm [0.00006 inch] per radial inch on the thrust area. The surface finish requirement is 0.04 micrometer [16 microinch].
CRANKSHAFT MAIN JOURNAL RADIUS - REGRIND
